Do I have a chance that she will come back to me? How do I get that chance?

My ex dumped me for some guy she met only once or two this Monday because he just suddenly showed up and gave her a rose, took her to the park and danced with her. He appears to be Mr.Perfect who is independent, romantic, tall, etc. We was in a long-distance relationship for a year though I paid my tickets to visit her twice and was planning on visiting her again this June. She said she has a strange feelings in her stomach every time she was with me and she knew it was love and whenever we touched, there was electricity that raise goosebumps on her skin. But then early today, she said she feels erflies in her stomach when he took her to the park but when she was with me, she felt nervous and anticipating. Aren't nervousness and erflies the same thing? During our time together, we have developed a lot of feelings toward each other and we talked about future a lot, about moving in together (she was so ready to move in with me next year and counting down every minutes every time I was coming to visit), having kids and all. But then this guy came to her life and everything is ruined. They had on the first date, talked about kids the next date and she said she would wait for 8 more months until she's 18 to move in with him (she's 17 and he's 26 and is still living with his ex whom according to him, broke up with him 3 months ago) and they have every day since then. Today I talked to her and I asked what she was feeling for me anymore because she still contacts me a lot, tells me everything that happens around her, calls me in the morning to gay good morning and let me watch her sleep on cam at night. She cried on my shoulder, kissed me (but she stopped suddenly because his scent on her was bothering her to make any further move with me). She told me bit of her still loves me and I will forever remain a dear person to her whom she would trust her life with. There were times when I just caresses her skin and she said those were the best love-making ever though I can't mention that to her anymore because most of the time I reminded her of our times together, she became really quiet and said, "I can't take this..." except one time when she was upset because her mother wouldn't want her to date someone so old; after I comforted her (she came to me and not him), I kissed and caressed her cheek and snuggled with her (all cyber like we always did for the year when we was together) and she looked like she was drawing back to our memories together until his scent from her shirt raised up and interrupted her thought. She still keeps all the stuff I gave her and artworks we made together. She didn't even put them away and still displayed them all around her room accept for my shirt and the pillow I used to sleep on. Before that, she always slept on that pillow that still smells like me but she sleeps on the shirt that smells like him now. She said she already forgave all the wrong things I did and want to BE with me (that's exactly what she said, with capital BE). I'm so confused and hurt... I know she still loves me a lot but at the same time, she is in love with that guy. When I asked her what if something would happen between them, she said she would chase after him and let him she what's in her. Today, her sister talked to him and all he talked about her and he likes her a lot but it was only and . My ex is a very sensitive person, she falls in love very easily. She fell in love with this stranger whom she met downtown just because of an intimate kiss. I'm so afraid now as she seems happy a lot with him. He may be using her but to her, he is the world now. Is there still a chance I can get her back? Please help, this is torturing me.