Big relationship problem :( Please help (10 points)?

[Katy Deblas]

Well me & my boyfriend have been on & off for 2 years. He loves me. I love him.
Okay lets cut to the chase.
I went threw his inbox I found out he & This girl talked. My boyfriend mentioned he had a girlfriend (Me) BUT then they (the girl & Him) talked dirty. It got to the point were they were gonna exchange nude pictures. I don't know what happen but then He said He had a girlfriend which he loved to death (Me). I got so pissed off. I talked to him about it & He said He thought I flirted with a guy on facebook. (This all happen on our facebooks) So he went to flirt with another for revenge.
I told him he should talked to me & I deactivated my account for him. But yeah Im not sure what to do Were like still together yet broken up . I really love him but Looking at the screen shots It breaks my heart. It really hurt me. We been threw alot honestly but Im not sure if we should go on or not ;\ Please help me