Confused relationship

Me and my boyfriend are in year 12 and have been officially together for 9 months, lately his been accusing me of starting at other guys and it just seems like almost every night it causes an argument. Lately we've both been feeling down but he's been telling me that I don't try hard enough and that he feels that I don't care enough for him. I feel like he doesn't notice everything I do for him or my affection. We love each other and I want for us to be able to overcome this, anyone have any advice as to how we can overcome this?