Should I talk to my ex-girlfriend?

Ok so long story short. I used to have this girl as friend about 3 years ago. We suddenly felt in love and went out too. We broke valentine's day of 2009. Since then, we have not spoken to each others. The thing is that I still love her, and miss her as a friend. I have tried to send her text messages but she never replies back. So I kind of feel that she is not interested in me. But since then I have seen her twice. She has tried to make me feel jealous by bringing her "boyfriend" around me. I found out that it was a lie, and that they are just friends and they would never go out. So I feel that she still has some feelings for me. I want to talk to her, but I''m just confused. I don't know if she likes me because she has tried to make me feel bad and jealous. I see it as a good and bad thing. Why would she try to make me feel like that? I feel like I'm wasting my time by pursuing her, but I really want her back. Should I talk to her on the phone? I just don't have the guts because I haven't talked to her over a year 1/2. What should I do? please help.