<human>: My gf and I have been together for half a year and are in college together. Our relationship has been going fine until her ex started to text her 24/7 (he already texts her somewhat)  and she is always on her phone. I have reason to believe that he is trying to get with her. Here's the background:

Before me, my gf dated her ex for a couple months. However, he had to move so they broke up. After their breakup, he still talks to her regularly, which is fine. However, my gf admitted to me that he hasn't quite moved on yet and she took his virginity. In addition he wants to fly out to her town to meet her. (which might or might not happen). He keeps contacting her through fb, text, Skype, etc. 

My gf has realized that this made me uncomfortable and stated that he is just a friend now. She also stated that she would never give up on friends for our relationship. She also said she cared for both of us. And she seems to enjoy talking to him from my perspective. So what do I do? Or am I just jealous? Help please and thanks :)

Can you summarize the given text in a few sentences?
<bot>: Gf's ex, who is still in love with her, is talking to my gf almost nonstop. Am I just paranoid? How do I deal with this?