Thanks for all the advice guys, it has been a massive help. I think now that I should tell him how I feel, at the very least it will take the question of 'is he or isn't he" away. We've agreed to go out for dinner tonight, unfortunately a mutual female friend will be there as well, so hopefully I can get rid of her long enough to at least tell him theres something I would like to talk about.
Question is now, how do I bring it up? Do i just come out and say it or should I try a more subtle, evasive approach?
Depending on how much the mutual friend knows, having her there could be a pro rather than a con.
I've made my best friend's boyfriends quasi-jealous because they wonder who she spends so much time talking to on the phone. She's had to out me to them because the alternative was for them to think she might have feelings for someone else.
If the mutual friend knows the situation and is supportive of you...and if she doesn't know, _maybe_ it wouldn't hurt to tell her in advance...then having her there when you talk with the guy you're crushing on could be helpful. OTOH, it could also just make things really awkward for everyone.