Girlfriend's guy friend is too clingy to her?

Anonymous
My girlfriend and I have been going out for 4 and a half years. We have talked about marriage and a future together. I'm 28 she's 24. She went away to college, after her first semester she got introduced to a guy through her cousin and they started talking. I know she's not going to do anything and she's never given me a reason to doubt her so I trust her. Anytime a guy finally showed they liked her she back away from them. When she came back home for Christmas break this guy kept texting and calling her all day. She kept responding because its the first friend she's met at school that she can hang out with. she went back to school and he still calls and texts her all day and they hang out a lot. She says he's just a friend and nothing will happen. And I trust her But I still get the feeling that from his side he likes my girlfriend. And if not this guy seems desperate and clingy to me to constantly keep in contact with my girlfriend, needing to know what she's up to all day long. What do you all think?
Girlfriend's guy friend is too clingy to her?
2 Opinion