I think Hankster's comment about the skewed expectations was good -- most romantic relationships start with those kinds of promises... and most romances eventually end anyway. For everyone, not just you

Dating friends can be really hard/awkward. Sometimes when a friend tells you that they have romantic feelings towards you, it's hard to know what to do if you don't reciprocate. I've sometimes stopped seeing friends who confessed those kinds of feelings because I didn't want to lead them on and didn't know what else to do.

You'll find something that lasts. It just takes a lot of frog kissing first