<human>: Can you succinctly summarize the text in 1-3 sentences?

Hi there redditors! 

Im 19 and my girlfriend is also 19. We've been dating for about 9-10 months now and theres this other guy that she texts who is a childhood friend. She knows i don't like her texting him because he's been pretty much inlove with her for the past years. She admits that she likes talking to him and has "feelings" for him. I use feelings lightly as she has assured me that she wants to be with me and wants nothing more than to live her life with me, but says she has feelings towards him in a way where she truly cares about him and all that "stuff". We're both extremely jealous people, if i ever talked to a girl like she talks to him, well we probably wouldn't be in a relationship still and i dont get how she is allowed to do this when she knows its unfair and wrong, but if i was to do it, It'd be World War 3.
How can i go about this? Any ideas on the situation?
Thanks
<bot>: Girlfriend constantly texts a "childhood friend" who is practically inlove with her and she admits to having "feelings" for.