im sure you are having a tough time bcos of your ex gf . but i must say you made the correct decision in breaking up with her . she is trying to alienate your frends from you by making you look like the bad guy and to get their sympathy . but if your frends are your true frends , they will realise at some point of time that they have been manipulated by your ex gf . and im sure that day will some soon . as you say , you've found a wonderful new girl , you shud concentrate on your relationship with her . if she is hearing all these rumours , she might feel insecure and you need to assure her .
i know you are having difficulty geeting out o this , but give it time , it'll sort itself out . concentrate on your new gf , she is more important than geeting upset because of your ex gf's spite . take care and keep in touch .