Unsure

So I love my boyfriend. I really do, he is my best friend. Lately things have been a little shaky. He is a self-admitted FLIRT! But it's more than that. I mean, he has said some pretty sexually explicit things to girls online. We're working on it....ugh. Sometimes I wonder if there is someone else out there for me. But even thinking that makes me want to cry because I would miss him too much.