What to do if he is is flirting with my cousin?

What can I do. I feel desperate just for thinking about this situation.

I have a cousin I met in Italy when I was 11. Then we met again through my space now that we are 23. I asked to come and visit me and she came. I was dating the man I am in love with. I do not know why I just trusted her. A friend of mine told me to be careful and not expose her to him. I didn鈥檛 listen, I though she had values and won鈥檛 allow him to flirt her, and that him won鈥檛 flirt her too. I don鈥檛 know why I trusted someone I had not seen in 12 years. I have the idea that I wanted this pretty cousin to visit me so that he knew I had pretty cousins. I even feel guilty for searching a pretty cousin around the world so that he could like her.
She was here for 20 days. I did everything to like her, but it was impossible. All she did was criticized me and my relationship with this guy, and the relationship with all my friends.

My relationship with this guy is really special, but we have problems because

we have problems because we live in different cities. We constantly break up and reunite, and that has been a year since we met. I had one break up before my cousin left.
Months later, she said, that he wrote her a message telling that he was going to Europe. That was a shock for me. She said 鈥渨elll anyway you broke up and aren鈥檛 talking anymore right?鈥?and I said 鈥渨ell he just called me three days ago, I am still emotionally connected to him鈥?and well I just tried to believe in the innocence of his messages and didn鈥檛 asked for more.
Two months passed since he wrote her a message. He just came to visit me we had wonderful time together, but we just had another fight. People around me says that he looks for fights before leaving just to try to keep me away from his mind because we cannot be together until may.
This cousin seems to evade me the last weeks on msn. Five days ago I could talk to her. I asked, 鈥渨hat happened with him?鈥?and she said鈥?

Talk to him.. But a lot of this was your fault.. Hopefully, the talk will put him back on track.

Kick him in the N***

Send her back to Italy and find a new b/f...
Don't marry someone you know will be a cheater...

I'd be one less relative if I were you!

nobody knows the relationship is special, except for you and him. maybe find a time and have a heartfelt talk with him to let him know how you feel?

Just wish them well...you've lost him already

well u need to tell your cousin about herself. and i think u should move on past your boyfriend. because long distance relationships do not work. trust me, i've had some experience. try to move on. maybe you'll find another fishi in the sea.