<human>: Here's the deal. This girl, let's refer to her as Madison, is in my freshman theatre class and sits across from me.

She and I seem to have a lot in common and I enjoy her friendship. We have similar pasts (self harm/depression) and we can relate to each other very well.

However, Madison is being extremely flirty with me - making sex jokes including the two of us, looking for opportunities to touch me, and initiating poke wars (common flirting thing at my high school). She is making it obvious she wants my number but I'm afraid to give it.

I'm afraid because her boyfriend is a sophomore football player, and I'm imagining would not be too happy about her flirting with me. 

How do I deal with this situation?

Give me a shortened version of the text
<bot>: Girl in my class likes me, her boyfriend is a scary football player a year older, have to let her down whilst staying her friend and not aggravating football player.