What Should I Do? 😕

My friend doesn't think I shouldn't date this guy, but I think me & him have a really good connection. I think he is exactly what I need in my life. He was there for me when I was alone. He has done some bad things, but he has done more good for/to me. He cares about me & I care about him, but my friend thinks because of the bad things he has done I should let him go. (The worst thing he did was leave without telling me.)  I am starting to fall for him & I feel like he could be the one, but my friend thinks he is no good for me. She is my friend & I care what she thinks, but I feel torn between the two of them. I feel like if I listen to her I may lose a chance at real love; I could become miserable without him. If I choose him against what she feels, it will be like I didn't really care what she thought, like I asked for her advice & ignored her advice. I don't want to lose either one of them. 😔 What should I do? Please help me. 😪