do i feel unheard or am i just being selfish

I feel so bad asking for help about this but I’m becoming a very bad partner with how I’m currently responding to this. My bf and I are both very passionate artists, but he takes the cake for most passionate I’d say. He will talk about his projects nonstop for hours and days on end. His current piece he’s talked about for maybe two weeks, everyday, it’s all he talks about and the first thing he brings up in conversation. He rarely talks about anything else now. I don’t mind a passionate rant, but this is constant, and a lack of variety in conversation…I just struggle enjoying it. I have begun to struggling with listening and my brain tunes him out. I’ve always had this problem w long conversations, but now it’s very VERY difficult to fight and I feel very bad. He will often have to repeat himself. I feel like an awful person for feeling this way, and reading forums online I have discovered this is a sign I don’t love my partner, bc loving partners can listen to their SO talk for hours on end, right? I keep fixating on this and I feel like this is the start of the end…I don’t think I can grow to enjoy this.

I have this strong yearning to tell my mother all my thoughts and what I go through on a daily basis but then I get scared of what she'll think of me or that she'll worry even more and feel like it's her fault. I just want someone to understand what im going through but whenever I even begin to explain my thoughts to my therapist, she doesn't really get it and today it feels like no one ever will. like I try to make my therapist understand and bless her heart, she's super compassionate and understands how much pain it causes me but beyond that, it still feels like im not able to fully convey it. I'm sure this is something many people can relate to, but still. I feel alone.

I feel my pace isn't being respected during therapy even after communication. Wondering if I'm not alone