Friends with benefits???

Recently Ive found myself in a FWB situation, we had relationships in the past and now we have a very sexual friendship. Mostly foreplay and oral sex but he is the only guy who has ever made me cum and orgasm. I want us to take things further and have sex. I have felt the need to stay loyal to him and not have anything special with any other guys. I am getting attached and I will even more if we have sex, and I dont know if he feels the same, what sould i do?