I'm an teenage girl and looking to keep a relashin but all the relashion I've been though they leave even when I'm trying hard to keep it alive

That's what happens during the teen years and even in the 20s/30s. People date and have crushes and think they are in love and then find out they aren't. That's what dating is -- trial and error, looking for the "right" or "perfect" person (who doesn't exist). There's an old joke:

Jim tells Mike, "I've finally found the perfect woman!"

"Yay!" Mike says. "When are you two getting married?"

"Oh, there won't be a wedding. She's looking for the perfect man."

Enjoy each relationship and learn from them all. If the guy wants to leave, let him go, and move forward to the next adventure.

Maybe your trying to hard to make it work lol, just keep everything natural and everything should just slot right in place (: good luck.

They are not worth it, the fact is that when your looking for a relationship you can't find one, but when your not, you do find one, just go with the flow. Start doing lots of things you like doing best, hang out with friends.don't worry you will find a guy that respects you and deserves you.