my SO asked me to look something up on his phone and when I opened his internet browser on his phone he was signed into his tagged account and left it with his inbox showing and he had messaged another female. . .on top of all that his profile says he is single and his pic is of his ex's baby that he doesn't know for sure is his or not. . .we have only been together 5 months. . .and today just before i seen all this on his phone his other ex called him like 15 times in an hour. . .trying to get him to take her back. . .he flips out if i am on my phone but he can talk to females and jack off to porn in the bathroom (42 porn videos downloaded to his phone). . .HELP ME FIGURE THIS SHIT OUT PLEASE

I suffer from depression as it is and always worry about being cheated on because I've been cheated on during every serious relationship. . .if he is cheating I'm gonna stay single from here on out cause im tired of being hurt. I just want one person to actually love me. . .but maybe im just not good enough for any man. . .please help me

*UPDATE* and new question. . .I took your guys advise and left him and the day I left he slammed me into the bedroom door about 6 times shoved me to the ground 5 or so times grabbed me by my neck and pinned me against the door. . .and threatened to take my son away from me (no he is not my sons father) I will be out of that relationship a month on the 21st. . .I met a new friend (yes a guy) that has been there to hear me out pretty much from day one I mean I met him a couple days after but still we have been communicating and getting to know each other better and he tells me today I don't want to rush things with US but you are the woman I've been looking for all my life will you please give me a chance to show you how a down home southern boy treats a woman. . .I told him yes. . .but now let me see to be him to you, 5'7", muscular body, tattoos on his cara1mel skin from his face to his hips, plump kissable lips and he is 13 yrs older then me. . .he will literally turn 45 just 9 days after I turn 32. . . Now here is the kicker we have never met in person we met on hot or not actually but he just recently moved 30 mins away from me to take care of his adopted mother. . .his car is broke down and im currently without a car. . .we want to meet and see where things go. how long should we stay in the friend zone before I give him the chance he has earned?