<human>: Can you give me the gist of the text in a nutshell?

Be sure to explain in detail with line breaks.
Me and my girlfriend have been together 2 years (started in high school) now we both have gone to different universities (colleges) that are 700 km apart. We are trying the long distance relationship which has been going pretty good all things considering. 

So there is this guy at her accommodation (couple of hundred people) who is within her group of friends. For the record i have no problem with her being friends with guys because we are both laid back like that, but there is just this guy and really gets under my skin. I reckon I've got his intentions pretty clear and i reckon he has a thing for my girlfriend my evidence is as follows
- he constantly snap chats her, they have a 130 + snapstreak

- he is always tagging her in stuff on Facebook, while we were on break i caught a glimpse of her notifications and they were all from him like 10+ in a row

- he texts her (don't know the content of these messages, we are not like that)

- he asked her if she could get him a tie that matches her dress for the ball they're having, now i'm not the most knowledgeable on these types of this but isn't that something couples do? like wtf dude 

- they've gone and seen a movie together too i do believe this was with another one of their friends though

- and just other stuff like hes trying to play the best friend angle 

so yeah was just throwing this out there to see if the people of Reddit agree with my assumptions and to see what i should from here? Thank you for your time in advance
<bot>: in a 2 year relationship, at different universities, think some guy likes her from indications on social media, just wanted to know what do from here