Well I don't know where to start so here it goes I am currently sing My last boyfriend dumped me for my best friend and Now I have moved on and I like some one else.(but where not together)and my ex decided he wanted me back but I turned him down and now there is a hole lot of crap going around about me what should I do?

What you should do? Tell us more details, we don't know you!

This is too vague!

Stay away from the ex who dumped you for your best friend.That is a real deal breaker.He should get no more opportunities to hurt you.

If people are talking about you or spreading lies about you try to ignore them even though it might hurt. Some people live miserable lifes and try to make everybody else life the same way. Or they go spreading stuff because they want you to react. Even if you know the person that is doing it confronting them doesn't always help and sometimes create more problems.

Don't go back out with the guy that dumped you for your best friend. How do you know that he wasn't using you to get to her?
All those rumors are childish don't worry about it. Ever heard of karma? Let them do their talking but in the end they will get their turn. Be happy and live life to the fullest and go after that other guy, see what happens! =D