Unhappy

I've been with SO for 8 years, we've not had the most picturesque love life, I understand there are you and downs, but I've met sometime who supports me mentally, physically (we've never had sex or touched, no kissing, no hands, no hugs, no physical contact whatsoever), he's helped me make sure I eat and exercise, he supports me emotionally ( when I'm feeling down or worthless he says kind uplifting words) and I'm attracted to him. I think about this man all the time. He has a daughter (his wife passed away while in labor with their second, his second child passed also) who is always saying you look like my mom, wanna be my mom. And I love her to death. I have a son also, dad left us at a young age (high school dummies) he got into drugs and is in prison. This man is 10 years older than I, but so handsome. I like him, I don't like my SO.. is that wrong, should I feel bad wanting to leave him for someone who could provide for me and my child (did not mention my SO is not my son's dad, my son doesn't even live with me because SO says we can't afford to have him with us) I don't know.. 😣😣