Hmm, it might be worthwhile to see how your glances look in the mirror. It might be that you are unintentionally looking at them in a way that would send a contradictory message to them. Also when you do glance and respond to people to you do anything else at the same time such as smile? I had similar problems in the past and found that smiling helped to defuse any unease I might accidentally put someone through immensely.
As far as finding someone goes telling them about your situation, tics, etc and helping them come to an understanding about how you truly feel for them is going to be key. They need to know that even if it seems you might be trying to push them away, what you really want is for them to reach out and try to connect with you.
_________________
Diagnosed ASD 4/22/16
All magic comes with a price! - Rumplestiltskin