Taking a Break

My boyfriend and I decided to take a break Wednesday night. We were just arguing a lot and I can't tell him my feelings without it ending up in a fight, that's not healthy for me. We're arguing because I felt unloved because he doesn't do the things that he used to when we started dating. And I understand that we're out of the honeymoon stage, but it's just the little things that I want back. Since we've been on this break I'm really nervous that he's talking to other girls. How long should this break last?