I'm getting all emotional and worried about our sex life....

So we've been together for a year and a half. We are both in our 20s and we love making love. Recently, I've placed this doubt in my head and it's really bugging me.. when we make love, I feel like he is getting bored with the same thing 4 or 5 times a week. Sometimes, he cant finish in positions that we loved doing earlier in the relationship. We have just as much sex but I just feel like he isn't finding it as sexy anymore bc we have done it so much.

I'm enjoying it and I'm not bored but what's the reason for him not being able to finish in certain positions like he use to?