Was I a rebound?

So I met this girl over the summer. She recently broke things off with her boyfriend cause she wasn't ready for commitment but it wasn't a bad breakup they still hungout. Anyways he found out me and her started hanging out and he got jealous and stopped talking her. I had a month before deployment and well me and her hungout a lot had sex and what not we really knocked it off. I'm leaving and she says she can't wait till Im back. Fast forward to 2 months later with no contact with her. I found out her and her ex are dating again and she might be pregnant. She says I'm a good guy and still want to be friends. I dont know what to do?
Was I a rebound?
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