My boyfriend is boring in bed now I met a more active man, how do I make a choice?

I’m 27 and I have feelings for two very different men. I’ve been with my boyfriend since I was 19. He’s lovely and reliable but I find him quite boring. He doesn’t really drink or like going out, and he rarely makes me laugh.

When we started going out, I was very overweight and had low self-esteem. I’d never really had a boyfriend and he was so kind and told me he loved me just as I was. Since we’ve been together, I’ve lost a lot of weight, got a job I love and made lots of new friends. It feels like I’ve outgrown him, but I can’t bear the thought of hurting him because he’s like my best friend.