To be honest I was always like that, but it's been cranked to 11 on E... To the point where I actually know how they feel and that eliminates the over thinking because well, I came to the correct conclusion, which never used to happen, and I'd be sitting with 2 or 3 possibilities instead of 1 just like you're describing. My advice, of your 2 or 3 possibilities, pick the most positive one and act on it, but without stepping out of the bounds of your relationship with that person, maybe they're feeling something for you, but they probably don't want their relationship with you to change suddenly from friends to more than friends, everyone moves at a different pace in that regard.