I think im a horrible person

I met someone, accidentally. I’ve been with my partner for 3 years now.. we had a baby 3 months ago. This past month I found out he cheated & this new guy is a breath of fresh air. New. A possible chance to start over? But my family, what if i give it up for nothing. Lol. I mean I wouldn’t rush into dating but just to continue to get to know him. I can’t do that if im with my partner. Idk. Lol