What would you do if you broke your bf cell?

I did that to my bf the other night.Its starts off by this female texting him,I texted her saying backoff he with me and busy.She replied calling me a ***** and saying she isnt going anywhere unless my bf changes his number or moves.I was freaked out about this female.I said to him who is she why she talking to my like this!! I said call her and tell her He continued to say she a ex co-worker.I couldnt take it Ive had females text him all the time.I was tired of females after I asked him to keep them away.Cause the females were ex's and girls he had relations with.Well I had his cell and I threw it on the floor.He go up and kind a[icked up the parts.He still couldnt give me any emotion and a great answer.So I got the cell screen and a screw driver an killed it.Anyway hrs later we made up.He later stated that the ex co worker was his ex gf.Oh no! He lied to me.So I said dont ever lie to me again.He cried we did again and later that night he pulled his old cell out which was still on.I know the ex has teh num,well he ended up going to the rr and i kinda didnt want to think about what or who he was texting.Thats night in bed we had .It was great.But i woke up at 4am couldnt sleep something in me that cant sleep.So I got up and got his cell I open it and the text from his ex. I then got a knife and stabed the cell the second one.My bf then woke up to me beating it.I went into the bedroom and slapped him hard! I cried and said why? How could you text her again after what happen.I started to goon a rage and beat myslef up and wall hit him and scream and cry all at once he couldnt help me I was too powered up.So tell me someone reading this... DO I need help? ANd now things are better.He since change his number.one cell now.Deleted his myspace fianlly.Is he willing to really try now? I know he loves me he does but just bad choices.