Personal problems within relationship

[YourWaryAquaLeader]

I am in a long distance but happy relationship for a couple of months now but sometimes I overthink and bring myself down from uncertainty.

I overthink too much which comes with a postive and negative light, I can think alot and come up with thoughtful things for her like gifts (my hobby is homemade gifts which we both love and I send to her) however, I begin to question myself whether I'm good enough for her sometimes. I know it may seem I'm going extreme but because we live far away, we can't do much things to support each other apart from talking online, so i wonder if she'll turn to someone else for help and become emotionally attached. Now it seems I'm being selfish, but it's just "what if scenarios" playing in my head, like what if she flirts (she can't tell when she's flirtting because she's a people pleaser) and it becomes serious, or what if something happens to her? Or it'll be over the smallest things possible like of she doesn't return my love you messages or ignores my cute messages? I know there are other reasons like she is busy at work, just tired or just doesn't have the energy to be all loving which I do understand, as this is a personal problem, and not a problem against her. I have alot free time alone when I'm doing something e.g. hourswork, so horrible things play in my head e.g. what if I suddenly die tomorrow, how would she cope or what if she cheats on me secretly or unknowingly? I have mentioned we live far, so we can't always reassurance e.g. checking each other phones (frankly I don't want to do that) but I hope you get the idea, its the void of uncertainty just floats endlessly and I just need to place my 100% in her, but my past years of living, I have never placed enough trust in anyone compared to her. I'm not trying to sound selfish because I understand, yes it is her job to serve customers but flirty just makes me a little jealous or when she says a guy flirted with her, and if the roles are reversed, she would also be jealous or even uncomfortable. We have talked about this throughly and she has given me deep, personal reasons why she chooses me over anyone else but it's just the uncertainty that worries me alot. Sometimes it's just the small, insignificant things that worry me and I'm just being stupid.
Any tips to help deal with my personal problems or how to cope with long distance relationship?

I think you should see a therapist and remain single. This sounds absolutely exhausting.

I doubt any level of reassurance will ever be enough for you.

Single? We are already in a happy relationship and she always gives reassurance, I am just an overthinker, therapist seems a little over needed

It’s really not. You absolutely need therapy. This isn’t healthy. You’ll drive her away and end up with your fears destroying any relationship.

I’m sorry but I agree with @YetanotherNC25 you are not in the right headspace to be in a relationship. You catastrophise, project and obsess over things that haven’t happened. You will push her away with this relentless way of ‘analysing’ things, when in fact what you should be analysing why you do what you do because it’s not healthy in the slightest.

sorry im going to have to agree with the others this is an unhealthy way to be thinking in a relationship, it wouldn’t hurt to work on yourself in the meantime in the hope that by the time you guys can live together/be more serious you’ll feel better

Yikes, I'd be running a mile, far too full on

At the very least I think you should find something else to occupy your mind as you very much risk pushing her away by being so intense.

Are your gifts to her woven from your own hair?

I know you’re in a relationship, I mean you don’t sound like you’re in the right mindset for one.

You know a lot of people benefit from therapy. I actually think most people need help in some way at some point in their lives. You just seem like you need to develop more self esteem and you have a lot of anxiety. Did you have supportive, healthy parenting growing up and healthy role model parents? I agree with previous posters that you could drive your girlfriend away with your insecurities. Relationships should be fun and joyful, not filled with angst. There’s also nothing wrong with being single for a while so you can work on yourself and figure out your goals in life. You shouldn’t be too dependent on anyone else for your happiness.