<human>: Can you summarize the given text in a few sentences?

My GF told me that her friend invited her to see cirque du soleil. He said that he could get $25 off of tickets and invited her. I think it would just be the two of them and It makes me a little uneasy. It is her friend from orchestra and I don't know him at all. She thinks it is just as friends but I feel he doesnt think that. He most likely does not know that we are dating or that she has a boyfriend as I dont hang out with her orchestra friends nor do we update relationship status on facebook. I dont want to be that overprotective boyfriend and stuff and I don't doubt her faith. Cheating isnt an issue I just am not that comfortable with it. Is this something I need to let her go to or would it not matter.
<bot>: GF wants to go to Cirque du Soleil because he gets a discount. I feel like he wants a date with her and doesn't know that she is taken. Not sure how to go about it.