27M dealing with rumination and that I can’t trust my 25F girlfriend anymore.

Honestly, my life is pretty lonely, I lost my friends because of stagnancy, i work a crappy job, my family members are well off but they don’t give me help, and I thought the one person in my corner would be my girlfriend at the very least, but she doesn’t call me, barely texts me, and half the time every time i try to reach out its always “i was asleep sorry” or “i was playing the sims” honestly i’m dealing with a lot and even though I talk to her, it feels hollow, like on the surface she cares but down she’s just thinking “ugh, this again?” We’ve been together for about a year now and her family loves me. But part of me just thinks maybe i’m not good enough, maybe she’s seeing someone else on the side, and the current setup is easy for her. I don’t know anymore.