I'm VERY sorry this is long but I really need some help. Long story short. My girl lives in Chicago, I'm in Arizona (I used to live in Chicago that's how I know her). I didn't see her for 3 years and she ended up visting my cousin out here and we fell for eachother again (she had a boyfriend too). When she went back, she literally was obsessed with me and I was too. She couldn't go more than 10 minutes not talking to me everyday.
Now 2 weeks ago, she met a guy and her and her friends have been going out with him and his friends A LOT. I got VERY insecure and paranoid that I started asking her "Do you like him?", "I hope you don't catch feelings for him", "Do you still wanna be with me?" and we fought about this like crazy for about a week. After I started acting like that, she started playing games with my head and started flirting with this guy on MySpace knowing I'll see it. The guy even changed his name on MySpace to "Nick & Jen's Myspace". (Her names Jen). She told me she would lose feelings for me unless I stopped so I stopped about 4 days ago. She ended up fighting with my cousin for hours today because my cousin told her she has no respect for how she's treating me. And she told my cousin "It's not my fault I'm not interested anymore." She doesn't know that my cousin told me.
Basically, I know I messed up acting so insecure. I know EVERY female hates that because their man gets weak. So I'm going to Chicago next week, and I need some tips/advice on what to do to really get her back. Everyone I've talked to is telling me "She's only acting like this because she wants to get reactions out of you. So when you stopped complaining she wanted you to have something else to complain about. We're sure she still likes you." And they told me to just not look depressed, try to have fun, and act like I don't mind if she leaves me and she'll eventually come back to me since we've had a huge past.
Any help would be appreciated. I really can't let this girl go. 10 years of being hooked on her is very hard to let go of.