Need advice on relationship issues?

Hello, I’ve been with my boyfriend for 2 and a half years… it’s been a rocky relationship, at the same time there are just so many things I love about him.. and I dont think im wrong if I say that, in the beginning I was the one crazy in love, not him, not at all.. but in time I chilled..and realized I didnt have to put up with everything just to like him and kinda became more rational and mature I guess, and its been great, we’ve become very close, and I love him very much. The thing is that, I met another guy, who I actually like a lot, and he likes me back, he’s told me so. But I had to turn him down. Now, he’s not just a guy I met overnight, I met him at work, and it’s been six months, we’ve become close friends… But somehow lately, I can’t stop thinking about this guy, and If I’m making the right choice here. What do you guys think? I’m very confused