I need some tips!!!!!

Makenna
So my boyfriend and I have been together for 4 years now. And obviously, yes, we've had sex. But since we moved in together, sex has been on the down low. I'm not afraid that he's cheating on me (considering we practically share our phones and are together 24/7), but I am worried he doesn't think the same of me. Yes, I've gained about 10-15 pounds in the last year. I do not consider myself overweight but I am not happy with my body. I want to do something sexy for him. Or maybe do something while having sex that will arouse him more than usual to make him want more. I like being physical with my man, so it sucks that we hardly ever "do the deed". Ladies, is there anything you would recommend me to do for him? Whether it's lingerie (which yes, I've done before. He loves it), certain things during sex, etc? If you don't mind sharing, please help! It's time to spice up my relationship!