Guys only help please?

I like this guy like more then I have ever liked a boy. I am bisexual and he knows his first reaction that's hot . I told him yesterday that I like him and he said that he doesn't want to ruin what we have. Then he says he has to jack off brb. a week ago he and me made a promise that we would sleep together with my futrure girlfriend . How do I tell him that if he is not my boyfriend I won't sleep with him? Does he like me even a little ? And also we were texting and I said brb and when i said back he never replied back can I text him again the next day without seeming desperatE?