Please help

A year ago my husband basically started a relationship with a coworker. Comes home almost every night past 3am. Locks on his phone. eventually tells me he wants a divorce. I beg him to stay and for months he says he wants a divorce but who knows he could change his mind.He claims nothing sexual ever happened a few months that hell lasted.. then he decided he wanted to fix things with me. I kept my distance because i was hurt. Fast forward to this year he starts talking to a new female coworker. All hours of the night and day locks on his phone. Going to her house to drink and claims they are only friends. He eventually says he wants a separation so i leave and stay at a friends house. Knowing what he is doing and giving him space. Im destroyed. I figure i know he is going to say he wants a divorce. I start talking to someone new...develop a relationship with him..but now the husband wants to fix the marriage. He admitted to cheating. Thing is i dont know what to do who to choose. My husband we had good times but alot of bad times. Emotional, verbal abuse. He provides financial support and we have built our life up. But we have not much in common. Fight alot. The new guy he is younger has depression issues of his own and can be childish. Works and has his own place he wants me to move in. But doesnt have financial support past a apartment and pays the utilities.but we have alot in common get along well. Sometimes butt heads because i have massive trust issues (funny i know)I know im a selfish person...im no better then the man i married..i know that im equally as messed up and well aware of my mistakes. Its a week before christmas and i need to make a decision on who to be with. This is a huge choice to make. I love and care about both..i cant be intimate with my husband. Idk if its because of my love for the new guy or disgust over what he has done i have no clue. Im a mess i dont know what to do. I work a fulltime job but everything goes to bills. My family isnt helping my parents want me to go back to my husband says he has changed. They dont know about the new guy no one does and that itself isnt fair to him. I know im messed up and in a very very sticky messed up situation idk how to get out of. Please dont be to cruel i know ive been a horrible person. Im just so depressed and lost i need advice..please help..