Should I Continue My Relationship

Hello,I'm 16 and I've been in a relationship with an 18-year-old boy for almost two years now we've been together at the beginning of our acquaintance he was a great womanizer I don't know what he liked but I fell in love with him to such an extent that I ran away from school I really fell in love he liked me but not as much as I did the same habits that in the beginning he hung out with other girls but I closed my eyes one day I realized he cheated on me with a girl from his school I was just ruined and put end but I was still so in love and I forgave him since then I don't know but maybe he realized that I'm not like the others and realized that he can lose me and somehow I don't know he became different became 50% at least great sense he tried not to lose me but the problem was that I somehow after my infidelity he was indifferent and I didn't care so much about him andI got cold and started behaving badly with him, I showed him how much I don't care and the stupid thing is that after this infidelity there was another one and when I put an end to it he collapses, he looks for me, he doesn't want to be with me and I shout like every time a chance it can change it can be everything ok and just to be happy constantly makes me cry and when I say end it also crumbles and from infidelity to this day for a year we do not stop arguing not to say a big word until half day we are fine the other one and we don't break up with each other all the time he behaves dumb maybe for about 7 months with me maybe already and he doesn't care so much about our relationship with anything I can't brag about the problem is that I don't want to be with him because it hurts me every day I cry and he also I know that I will ruin without him really in the true sense I say it I do not know what it feels like not youI don't care about a loved one and it's all yours and if you don't ruin it I don't know give me advice