I WILL KILL FOR HIM!!

Hi iconzbranding , Pls help me post this.
I am 22 and I have a guy I've been dating for 4yrs now. He just finished serving. Truth is, I love this guy to madness. He mentored me when I was still very young. He protected my interest and taught me a lot of things I know today. We are very close that we never let in a third party. But the problem is that he is a Ladies' guy. He can get any lady to fall for him...I've been a witness to this.
that you're a strong head no follow for this one...highest he will take months to get u down but u must fall. He enjoys doing this...in fact he brags with it. A lot of girls are begging for his attention.
Now, I know a few of these girls, it didn't bother me until I started noticing that some of the girls eventually fall in love with him and refuse to go. They start saying they can't get any other guy like him. These girls cry, send text messages, beg, send their friends to beg, buys things for him, they even come to his Facebook wall to lament. it got to a point where one of them got really bitter and started looking for me. Although we don't broadcast our relationship on social media, most people know we are together. I don't really know how she contacted me and started threatening me and my guy. I talked to him and asked him to stop making these girls fall in love with him, give them false hope and then push them aside. He only told me to relax that he is control of what he is doing and that he can handle it. I calmed down for a while...after a few months other people started calling me with threats...trying to make me believe am the side chick while they're the ones in charge.
To make things worse, I am a super jealous girl. jealousy can weigh me down and ruin my whole day. I had a big argument with him cos I later found out that he has sex chats with these girls and actually make them believe he really loves them. I got very angry with him and told him I needed a break. it wasn't up to a week, he came back begging and promising that he will stop.
I forgave him. after a while, he started again. we argued and argued but his defense is always that am the only girl he loves and will be with. That the other girls are just for fun. meanwhile, the number of girls that are willing to kill just to have him keeps increasing.
Now, I don't know if I should just leave cos am afraid one of them will hook him one day and I will be pushed out of the picture. I don't want such a traumatic heartbreak. I know if I go, I will not be myself for a long while. but I feel it's better than staying with him and waiting for a random girl to spoil things for me.
Note** I know this guy loves me...I just don't understand why he can't just leave the other girls alone and focus on us.
please I need advise on what to do
Thanks.

Please this is a real life story from my agency read and comment to save a soul, you resteem for more comments. Thanks.