Most Helpful Guy
You did the right thing by not telling him! trust me! he is only stringing you along you should cut all contact with him. he is already in a relationship and by talking to you and trying to get feelings out of you this way he is being disrespectful to his current partner. If he is doing that to her he would probably do it with every other girl he is with.
I used to be in a similar situation with a girl who had a boyfriend, I told her exactly how I felt about her after she begged and pleaded with me to tell her. It was the stupidest mistake I have ever made!