I have to agree with simply challenging... You really have to weigh the pro's & con's as to why you both broke up in the first place...
If one of you cheated on the other then it may be tricky because that is a trust issue to recover from! If it was based on lies, empty promises or mixed signals, you will probably think that same way...trust issues...why should u believe him a sec time... If it's because of family differences, the only thing I can say is ask yourself if being with him will jeopardize your relationship with your family, sometimes it just isnt worth the sacrifice...significant others may leave but your parents will always support in the end...no matter how many times you may fall! If it's any sort of abuse, verbal, physical, mental...then you really need rethink why you are even considering another chance with the guy!
All in all, it's entirely up to you...we can only advise you as best as we can. Good Luck.
I guess it all depends on the reason you guys broke up. In most cases, you have to prove that you won't do what you did before all over again. You have to gain their trust again, if it was broken. Stuff like that.
Please, please, please try to write using proper English--spelling and grammar. You'll get more answers that way, I promise. It's impossible to read what you've written.