Please keep in mind while you are reading this. I don't normally fall for guys in a relationship because I would never want someone to break my happy life apart

But I have been talking back and forth with this guy for a couple of weeks now. It's all been friendly conversations. Nothing bad. I swear. But a part of me really likes him for who he is. He is always making me smile and I don't even know how or why I'm smiling. It just happens. He's been with his girlfriend for a couple of years now. He's been talking to me about his personal life and he tries to be there for me as a friend if he knows something is wrong. But I have never been able to be as open with someone before. I don't know what it is about him. Part of me wants to just stop talking to him completely because I know I'm letting my feelings get the best of me. The other part of me wants to push my feelings away and continue to be friends with him. But he's kinda sending mixed signals too. So I am now kinda confused. Any friendly advice would be greatly appreciated. Please don't say anything mean. I really am not trying to be a home wrecker by any means.