<human>: Recently, Jonathan [m22] has been introduced to my [f21] circle of friends by a mutual friend, mike [m22].  This circle of friend is all male and I am the only female, besides an occasional girlfriend hanging around. 

After hanging out with Jonathan and the group a few times, I've noticed that he treats me in a weird manner.  I constantly catch him staring at me only to look away when I make eye contact. He is rather shy talking to me but when he does, he says things as if trying to impress me. He always sits next to me, yet from a distance. He also always brings up our German heritage and throws German words at me (more on this later). 

I may be dumb an naive, but those usually are things grade-school boys do when they have a crush... 

I brought this up to our mutual friend Mike, who has known Jonathan for 17 years. Mike loosely noticed these actions too, especially the part where he always brings up our heritage. Mike mentioned how Jonathan has other German friends (male and female) but never acts this way toward them. Then I was hit with the fact that Jonathan is not yet out of the closet, but mike is 95% sure he's gay because of previous hints, conversations, and him keeping his dating life very private. This confused me very much. 

Why would a (supposedly) gay man act like he has a crush on a straight gal? Am I reading this wrong? How else could this possibly be interpreted?

I normally would have no issue approaching someone and asking then questions like this, but the friendship with Jonathan is so fresh, I do not want to put out an unwelcoming vibe.

Could you distill the essence of the text into 1-3 sentences?
<bot>: supposedly gay friend acts like he has a crush on me. Am I reading this wrong? How else can this be interpreted?