Afraid to be sexual/intimate with my boyfriend

In the past, I've always had just relationships that just turned in to lust, I became a really sexual person to my exes, sex became just sex and only about that in the end.

With the guy I'm with now, I don't want to be that person towards him. I really care about him and I don't want to mess up that it'll turn out like my old relationships, lust.

I guess I want to keep it innocent but I'm also really wanting to be intimate with him without worrying that it'll turn into lust.

any input?