<human>: Can you give me the gist of the text in a nutshell?

These days kissing does nothing for me, and feels like a chore. Hugs always seem unreasonably long and I find myself making conversation or needing to cough in the middle of them as an excuse to stop. When we go to bed I feel obliged to have sex and relieved afterwards because the obligation is gone.

But when we *do* have sex (2-3 times per week, she doesn't stay over every night), once I get turned on I'm totally into it and we both have a great time. It's like primal nature takes over. And strangely, I do feel affectionate/intimate once that happens.

I can't really point to anything in our relationship that may be causing this. She's quite extroverted and I'm introverted, but we get along quite well. I'd like to be as affectionate with her as she attempts to be with me but I don't want to feel like I'm faking it.

Is there a common cause for symptoms like this? Other posts on this subreddit seem to be about the *partner* acting this way, rather than the OP. Thanks in advance.
<bot>: Feeling less affectionate/intimate around my gf, not really into sex until we're in the middle of it