So This One's A Hard Question.
A Friend Of Mine Who Now Is 22 Years [ Girl ],well she was committed from the age of 16 till 19,then they left each other,then a year later they began to try again,but it was no use.I know both of them,they both agree that they wish to be together again,but he adds also that he's scared,because if in all that time they didn't succeed how will they now?
My friend [ the girl ] she's been devastated since the day they left each other,she's madly in love with him.However there's one problem,he's now been committed for 5 months to another girl,in my opinion to forget my friend.what do you think she ought to do? Moving on is one suggestion,but it's damn hard for her to practice :S

As he is with somebody else,rebound or not,she should move on.

They tried,it didn't work out and at some point she needs to realise that its over.

Now would be a good time.

She will get over it, once she is tired of being miserable, if she doesn't do anything to make a fool of herself. That only makes it worse, and your right, it is hard in practice to accept a break up, and move on.

I understand they were their first, still miss each other, but I personally think they have very slim chance to make it work.
They were in relationship in their teens. They are 23 now, grown up, changed, have seen other people, have tried it before but failed once. If they try, it will only repeat the cycle.
I picture they will get over each other, and move on eventually, either they like it or not.

Moving on is the only thing there is for her to do unless she wants to make a fool of herself and that should not be an option.
Sometime the right thing to do is painful but it is still the right thing.

Seems like you really would like to have some advice that would get your friends back together, but under the circumstances I don't think you'll get that type of advice here.

There's really nothing at all she can do but move on. Maybe you can just be there to help her through it all.

Since he is in a current relationship, she should stop keeping false hope alive. Even if he ended the other relationship, I think they should both take time to heal from the past. Jumping from one relationship into another, especially if it is a reoccurring relationship, is a bad idea. The 'new' relationships usually end up being rebounds.

The worst thing that could happen right now is for them to get back together without having worked out the past issues. Second worst, is getting together with someone new without having dealt with the baggage they collected in the previous relationships.

Can you get her to read the stickies at the top of the Relationship Board? They might help give her tools to help her move on and allow herself to heal. She needs to keep herself busy-mentally and physically. She needs to get out and make new friends that she doesn't share with him. Most of all she needs to have No Contact with him. That includes getting updates on his life/relationship from well-meaning friends, MySpace, Facebook, etc.