Love triangle

I’m caught in a love triangle right now and I don’t know what to do. So basically I broke up with my son’s father and met someone else. Unfortunately my son’s father passed away and the guy I started dating stepped up and helped me immensely with my son but we’ve also had our issues, believe me. So him and I have been off and on for months. A couple weeks ago I went to a party and met someone and he’s wonderful, him and my ex are night and day. I saw him again over the weekend and we had a great time but in some way I’m still attached to my ex and we’ve been also hanging out. I think because he was here when my son’s father died i can’t let him go for some reason. I have no idea what to do - I care about my ex but I really like this new guy. So confused :(