can you accept he/she comes back once again?

Never. Past is past. Because mostly I was the person being hurt the most.

This is d real situation of mah lyf...its happen wid me dat mah bf leaves me alone n afer 6 month he came back in my lyf ...bt still i love him ...firstly i reject him bt later i accept him bcoz i cant live without him....

It depends on how and why we separated. If he cheated on me, i guess i will not want him back, cause i will be thinking that he would be cheating on me again. If there are other reasons like we have lost time for each other, we have decided to be separated for the mean time, work, family reasons, etc.. i guess if we meet again and we still have feelings for each other - we might try it again if he asks to be with me again. If i love a person, i dont forget them so easily..that person is always on my mind and that makes it all different why be away from the one you love if you can be together?

that depends on the situation entirely, in the past n in the present too... my case was the same. my b.f. and i wre separate for a year but he had some reasons valid enough to separate. however i was never able to forget him n move on in life. he came back after a year n wanted me back. and i said yes cause i wanted him as much as he wanted me.. and i had no qualms since he always loved me...

If i love him i want him permanently around me. That is the reason because i accept him back. But is depending of the situations, of the reasons because we break out. Even if two people love each other very much and they aren't made to be toghether they will arrive at some time or other to the end of their relation.