no sex drive

I've had this issue in every relationship I've been in where after the first few months of being together, I subconsciously lose interest in sex and don't need it like my partner does. Like I could go a long time without intimacy and not notice it. This is more than just the whole "honeymoon phase" slump. I'm with a guy now I could see being with forever but this is turning out to be, obviously, an issue for us. It's never been an issue with who the person is. Just simply that I forget about intimacy because I don't need it like my partners have. I've wanted to see a sex therapist about it to work through why it's happening and how to move past it but that's SO expensive. Any suggestions/can anyone relate before I break the bank to go to therapy?