So im in love with someone help?

so i love him and i get jealous cuz girls are all up on him and im scare to lose him as a friend when i talk to him i smile and i feel safe sometimes we fight and we dont talk for a long time i ignore him and he ignore me but theirs girls and im scare to lose him i mean it been long time now and im sure im in love with him he sometimes tell me i love him and then he just get mad and we fight a lot and then he ask me why i dont talk to him and then he leave and i fallow him what can i do to keep him? i dont want another girl to take him from me