This is my life

About ten years ago I met my girlfriend, we were on highschool at the same time I met Jose Antonio. In that particular moment Ari was so in love of Jose Antonio and for me they were just a couple of good friends even when I felt something else for Ari. As the time passed by we grew up and each one of us took their own way but Ari always felt something more than a friendship about Jose Antonio.
Now 10 years later Ari and I start a new relationship I really don't know how we started to go out.
Now Jose Antonio is fighting for her love, he wants to go out with Ari, he doesn't want to be her friend anymore he needs something more, but why now? why after 10 years?.
Yesterday Ruben told me that may be I'll just another boy in her life and maybe she'll only use me as a couch for her next relationship. Today she came back from her travel and of course she saw me a little bit worried so she asked me why I told her all the stuff Ruben says and she get so angry because she says that is not true, and explaind me that Jose Antonio is just past.
But he's still trying and he'll keep doing this unti....well I really don't know how much he will try.
What to do? what is the best practice?
should I change something? or just being the same guy.