Female Advise! Please Help

Ok long story I will try to keep short. I have been married for 2 years. But we've been dating since 2011. We have a 1 year old son. My husband cheated on Me before, had sex with a co-worker when I was 8 months pregnant. Other times I found txt from females on his phone, as far as I know just flirting. I found txt about 5 times from different women. I forgave him and I'm still with him. I've NEVER CHEATED ON HIM. I recently did a seminar (non churchy) one of the rules was not to start any relationship with anyone in the seminar because the seminar dealt with different emotions and feelings might get misunderstood. I met a great guy there. He's been a wonderful friend, but I've noticed I think I may have feelings for him. I like everything about him. He's told me he really wants to be with me, that's he's cought feelings for me. I haven't told him I like him because I don't want to lead him on. NOTHING HAS EVER HAPPENED BETWEEN HIM AND I. He knows I'm married and he has respect for that but I can't help but have feelings for him. I need advise weather I should give this guy a chance. I don't like being attracted to another man,and hiding it from my husband. He should be aware I've cought feelings for someone else. But how do I know I accually like this man, what if it's just mixed emotions that were dealt with in the seminar. I don't want to lead him on and not accually have feelings for him. Please help me