Why did her mind change so quickly with me during our LDR?

[confusedpenguin1]

She is 25F and I am 29M.
I am from an European Country and she is from Mexico and we met 2 1/2 years ago randomly on a vacation in Asia. We immediately hit it off and fit really well together since then. Our humour is similiar and we never fight. In general she is a really loving and caring person with only a few quirks.

During the past 2 years I sadly wasn't able to meet her family in Mexico yet due to my life at home, but she visited me twice here for a short time. It was planned for her to stay here for an intership for a year later this month which ultimately she decided against (I assume) but more about that later. After she came here for my birthday in March, she went to work in a christian Summercamp for three months in the US where she needed to turn in her phone constantly so she couldn't use it much. Before the camp she was worried about it and cried on the last day here saying "if I change my mind I should just let her know" since we wouldn't be able to text as much. But I told her it will be no problem for us.
Fast forward to the beginning of August. We texted maybe twice a week until then which was not a lot but manageable for me since the camp would soon be over. Beginning of August she told me I should help her later this month with visa stuff for the planned Internship in my country and of course I said yes I'll help. Then during august the texts got less and less to one text per 7 days which was hard for me but I didn't say anything about it yet since I believed it would get better after the Camp was over. The text always included "I miss you so much" and things like that. During the month she never mentioned the visa thing ever again.

When the camp was over about two weeks ago the text frequency didn't really pick up. She send me two pics from her short stay in New York. Two days later I randomly call her and she immediately sends me pictures from being with her cousins back in Mexico. The lack of communication made me question our relationship so I replied with a lengthy voice messages that I want to be a part of her life but feel like I am currently not at all. And I also asked 'what are we?'.
Her reply to my voice messages was that she really misses me and wants to see me and would love to call me the next day at 10pm when she is home to tell me whats been happening in her life.

Come the next day 10minutes before the scheduled call she sent me the following text:
'Hey I wanted to talk to you about us. I've been feeling a bit distant lately, and i'm not sure about my future plans. I apologize for not being more present and I don't want you to feel like i am not interested. However I think its better to be honest and open about my feelings. I'm feeling a bit uncertain about everything and I wanted to share that with you. I don't want to keep going anymore. I'm sorry for saying it like this but i havent gotten home yet.'

My reply was a question when she will be home because I still would like to call. Since in my opinion a 2 1/2 year relationship deserves at least that as an ending and I was so confused about the sudden switch from 'miss you so much' to ending things within 12 hours, but I never got a reply to when she will be home.
It has been some days.
My assumption is she decided against the internship and hence also against me(?), but thats nothing that we couldn't have talked about in my opinion and it is really unlike her since to be honest, she was the one who showed her love during the relationship always very strongly.
Hope my post was ok like this (first time) :)

Sorry to hear, that must be tough. I do think LDRs are very hard to sustain. It’s no-one’s fault I just think without regular time together (particularly at early stages) it’s hard to build that long-term bond and that trust.
When a relationship ends - particularly when the other person ends it - it hurts, but the hurt will fade. When you’ve healed (take your time) you might find it easier to date more locally :-)

She’s broken up with you. There’s no point analysing it or forcing her into a drawn out miserable conversation about it. It won’t change anything. Just move on.

you say 2.5yrs but how much did you see each other? Texting/ phone calls isn’t a relationship.

I think perhaps you thought this was more serious than she did, or she thought it might be useful if she came to live near you, but she isn’t doing that now.

If she wanted to make it work she would have jumped at the chance of the internship and living near you. She didn’t.

If she cared about you she wouldn’t dump you via a message then blank you.

I don’t think this “relationship” was what you think it was and it’ll be better for you to move on, forget this and find someone who lives in the same country as you whom you can see regularly instead of texting and with whom you can actually have a genuine human connection.

She's made the decision and it sounds like she doesn't want any more contact with you. I know that's hard to take when you've been making plans for the future but you have to try and move forward with your life now. It's very hard to keep a relationship going long distance, it sounds like she has been having lots of new experiences and she may have met someone else. Give yourself time to get over this upset and spend time with your friends and family.

I've had two long distance relationships in my life, and both times I ended them suddenly.

It was like a switch went off in my head, that "This is just too much work for very little benefit". I think it's just easier to see that something isn't working when the other person is hundreds of miles away, and also there's less incentive to try and fix it when you don't need to disentangle your lives.