I may have skipped a post about this topic but searching I haven't found any. If this has been asked recently, I'm sorry.

My partner (19F) and I (18M), have been together for 10 months, and this last 3 months have been pretty bad for the relationship. I always try to be as careful with what I say and do to not hurt her feelings because I know about her condition, but I'm a very careless person, so a lot of times something I do or say end up hurting her, she gets very very mad, says things that hurt my feelings and in the end she will feel guilty and with me consoling her, this is almost in a daily basis and most of the time we can't talk about it in person because we live at an hour at car from each other and neither of us have a car.

I also don't know how to console her a lot of times when she is sad, and she ends up also getting mad at me and the cicle repeats. I want to know specially how to console her, because I feel every way I try to approach the situation is incorrect and in the end I end up feeling useless and that I don't do her any good. I have tried asking but it seems that even she doesn't know. I only want the relationship to be good so she can benefit from it.

I'm seeking help because in this last few months I feel that I have tried everything. If someone that was in this situation or has BPD could help me I'll be extremely thankful. If anyone has any doubts about my story or situation I'll be happy to answer.