Sorry this is probably going to be long!
I fell pregnant in May, just as I finished my A-Levels. I was 18, now 19. I decided to continue with the pregnancy.
In July I went on a girls holiday with a group of my best mates that had been booked since the beginning of the year. I was 12 weeks pregnant, knackered and had horrendous morning sickness but I just wanted to go relax for a week. They all went clubbing, etc on a night. I was exhausted so went back to the hotel room after dinner most nights which wasn't a problem. I didn't expect anyone to go with me, I just went and read my books and slept which was fine by me and I really enjoyed it. Things started to change on the holiday though - people were hardly speaking to me when I made conversation with them and they were ignoring me and leaving me out of conversation on a night during meals. On a couple of mornings when I had particularly bad sickness, one of the girls had a go at me for waking her up by being sick 
One afternoon I felt really light headed from being in the heat so went up to the room for a lie down. That night when they thought I was asleep I heard this girl saying to the others how pathetic I was being in regards to 'always being sick and needing to lie down' and that if I carried on being 'pathetic' she was going to hit me. No one stood up for me, I could hear them all agreeing saying how I needed to 'get a grip because I wasn't even that pregnant yet'.
In the airport on the way back home I asked if someone could help me lift my suitcase onto the conveyor belt and I was told to 'stop being pathetic' and I was 'pregnant not disabled'.
after the holiday me and DP moved about 40 minutes away because he got a much better paid job. I kept asking my friends if they'd like to meet up, etc, but no one ever replied. I texted them all on results day to see how people had done, again no one replied. At the end of the summer they all had a get together that I wasn't invited to and on this night I received a text from the 'ringleader' of the group (who had threatened to hit me on holiday, etc) saying that they'd all decided that they had nothing in common with me anymore so could no longer be friends with me. Fair enough, we were going different directions in our lives and I needed to concentrate on my pregnancy and couldn't be bothered with bitchy girls.
Everyone went off to uni, I was working full time and just got on with my life. I never heard from them again.
DS was born a month ago and after he was born all these girls got in touch. I'd long since deleted them off Facebook and they messaged me asking why I'd deleted them, they'd love to meet up and see the baby, if I needed anything I knew where they were.
None of them apologised, and I ignored them all.
Last week in the post I received an apology letter from one of the girls saying she was sorry and that she should have stuck up for me in the summer, and basically that they'd all decided that I was making the wrong decision by keeping my baby so they'd decided not to be friends with me anymore. However, she said she could now see how wrong that was and she hoped we could be friends again.
I really don't want to be friends with these people after the way I was treated, and I'm more than happy just to forget about it all and not speak to them. My life hasn't been ruined in any way, shape or form - I have a beautiful baby, my partner has a good job so the bills are always paid, there's always food on the table and we have money for nice treats, and I have a university place in September. However my mum says that as they took the time to write me messages after DS was born, I should forgive them. The rest of the girls keep messaging me on Facebook asking when they can meet DS. I have no interest in seeing any of them ever again. AIBU not to want to be friends with them and just to ignore them?