<human>: I'm (f 23) thinking of ending it with my bf (m 26) and I don't know if it's the right thing to do. We've been together 2 and a half years and I just don't know if he's "the one". I feel like I should know by now. I tried to end things twice...but always came back because I think he's such a great person.  He's a great friend, and he's wonderful, but I'm not sure we've ever had chemistry (at least on my end). I've been fantasizing about being with other guys (in dreams/daydreams) although I'd never cheat on anyone. My bf is my first real love, and I've only been in a couple other relationships. I'm curious what else is out there. Does this sound legit? Has anyone even been in my shoes, and left, and been okay in the end? I'm scared of leaving him and regretting it. Thanks much.

Can you condense the text into a few key points?
<bot>: should i leave a great guy that i don't have a lot of chemistry with to see what else is out there?