Father daughter trouble 😞

Okay so I've wanted to talk about this but felt a lot of anxiety about summing it all up. My dad has never been the super feely type. But he started to hold grudges about wierd things once I moved out after college (I lived with him full time while in school for 2.5 years) I've tried to make it out to be hard feeling that I left (even though that was the plan) I can understand him being hurt but he never said a thing about it. It wasnt until a full year after moving out that I got pregnant and all this stuff came out from his girlfriend about my sister and I being disrespectful for many different "reasons" that I find ridiculous. I watch lots of dr phil so i try to see it as perceptionis reality so it must be his personal reality. So I've worked hard to try to change that in the recent months. Then I bring up that were planning my shower and i wanted to know if he'd be there because his mother assured me he will and that he'll get over it. I'm 21 and the situation could be better (I'm very excited though) but he is acting like a whole different person than who I was with just over a year ago. Its been weighing on me heavy that i feel I've been trying so hard and getting no where. His girlfriend told me i need to stop pushing him but i thought i was just trying to keep him involved which was one of his original excuses for the change in relationship. I partially needed to vent and also want some opinions🤷🏼‍♀️😞