@Prarthana in my opinion you should Break up I was also once in a relationship and he always start fight bcs he said im too cold and dont care about him and I felt uncomfortable bcs he was actually always the Person who starts a fight but i didint wanted to Break up with him bcs i loved him but at the end he broke up and now After a time im glad bcs i was a fool that i stayed with that Person and i think when your bf download other Girls pictures he would also maybe do more some day also when its hurts bcs you love him he isint good for you bcs you hang on someone who maybe watch other Girls picture in the moment you miss him or are hurt of his actions and rack your Brain over the Situation. That what i think i know it can be Hard but with the time its getting better and you will see the truth and be glad .Hope that helps!!