I love some one but in istikhara allah said if we will married its not good for us.but I feel I can't live without him.any solution about this matter in islam?*** reply me soon.I want to wait for him.is it possible after some time allah's decision in our favouer?

Salat-l-Istikhara (http://islam.about.com/od/prayer/a/istikhara.htm)

Of course you can pray.