How to spice up sex??/ low sex drive

Lily
So recently my long distance boyfriend has been over and the sex hasn't been that great. I normally always cum from him licking me out but that hasn't happened at all and I'm mainly cumming from toutching myself. On New Years we were having sex and he stopped and asked me if I was ok because he could tell I wasn't into it. It's really sad because I want to enjoy it and I don't want him to feel like he's not good enough. I'm seeing him for the last time in over a month tomorrow so I really want to make the sex good. I'm into being dominated so I'm thinking that might spice it up. Please leave suggestions on how to make sex more exciting! Thank you.