Should we brake up ? or stay together ?

I have been with my boyfriend for an 1 year and 3 months and everything has been grate we do have usual on and offs but I truly love him he’s two years older than but I have known him since I was 5 ………..so lately he while kissing or making out he has been acting really aggressive and protective over me at the point that if a guy looks at me he will punch them (its happened before) he seems sometimes like he only wants my body but sometimes he’s really sweet ……..what should I do I have really deep feelings for him but should I consider seeing other guys…………..help! btw im 15 no rude comments plz I know im young …