HELP! I DONT KNOW WHAT TO DO!

so me and my husband have been separated for a few months now after he cheated over 2 years..i left i’m living with my sister now and maybe 2 weeks ago i started talking not dating talking friend talking to a guy he’s been all abt me and is giving mixed signals..buutttt my husbands side chick messaged me this weekend talking abt how she had a great time with him on their mini vacation talking all this smack and i told her i’m talking to someone else so if they could leave me alone that i want nothing to do with what they are doing well long story short she told my husband idk what thought or what but now my husband is literally begging me on his knees that he wants me back that he will do any and everything for me to come home ASAP..he’s my husband for almost 8 years has been cheating his side chick is clearly crazy and doesn’t care to be the side chick she has told me before that we can both have him type deal and that if my husband ever looks for her she will be there for him every time so it’s like ??? i’m confused i don’t know what to do..i want to go home and give it one last try but then again i don’t PS i’ve never seen my husband act how he’s been acting the last 24 hrs non stop crying like a kid literally begging me and idk..any advice i’m confused he said if i could go home and if i’m not happy i could leave when i want and he would accept it then but what’s the difference i told him i needed time but now it’s about me talking to his guy when i’m not answering him..i’m going crazy idk what to do.