Help me???

When I don't see my boyfriend for awhile I get really angry at him and everything he does and I just want to get out of our relationship and I don't feel in love with him AT ALL. But if I see him everyday or every few days, even if it's just for 5 minutes, i feel so in love with him and I feel all floaty and giggly. I don't understand why this happens to me. I really love him & I can't imagine my life without him, especially since he's one of the only people who's actually there for me and who actually cares about me.