So my bf had a one night stand with a girl before we started dating she calls him about 3 months into our relationship and said they she is pregnant and it could be his or someone else's.. She then calls again saying she is almost positive its not his due to the timing or what ever so we kinda stopped worrying about it til about a month ago when she says she had the guy she thought was the father do a dna test and it wasn't his so he needed to do one. My bf was tested and turned out he is the father. She is already 5 months old.. Anyways I'm having a very hard time accepting these changes even though it's only been since Thursday since we found out for sure.. He wants to keep the baby every night and every other weekend.. Yes its great he wants to be a dad and that he is stepping up but I can't help but feel like all that I've known is gone.. My relationship is already changing .I now have to share my bf with a baby and he now has a babys momma.. I'm jealous that he has a baby with someone else.. We just decided we were going to start trying for one and now that he has her he wants to wait.. I feel so immature , weak, and like I'm disappointing him because im not all happy for him.. I will love this baby because I love my bf its just a lot of things are changing.. It's so hard :( idk if I can make this work and its killing me