Don't get lovestruck with people you don't know the orientation (coming out to crush story)

Hello there. I come here to talk about my coming out, and because I somehow feel the need to vent. Well I'm 20, second year at my uni. I came out to my parents 3 weeks ago, and to my brother yesterday (he's also gay). And today I came out to my crush.Well, Let's start by the beginning, Back then, in october, I met this guy, 21, during my enzymology class (on wednesday), and he was caring about me, we worked together and showed some affection to each other. Well tbh, he was stroking my hair each time I put my head on the desk during the class and when I invited him at my place.He finished his year in december, so I didnt get the chance to talk to him IRL after it, We still texted each other alot though. But for the first 3 months of 2017 I was depressed because I couldn't see him.After I came out to my brother yesterday, I thought it might be a good idea to tell my crush I liked him; I tell him I was gay, that I found him very attractive, interesting and brilliant and that I got depressed because of my situation.Well... He told me he guessed I was gay, but he said he was into girls. When I told him about the several times he stroked my hair and such. He replied he didn't recall. I got a bit upset and didn't replied since then.My story ain't that interesting, I just feel empty by this, pursuing chimeras, even more when he showed multiple signs of interest, but don't recall the most meaningful ones (I mean, you better recall when you stroke another guy's hair several times).Anyway, I don't know what to do now to turn the page, I'm afraid of seeing i'm next year at my uni..I guess the moral of the story is that, you shouldn't fall in love with people you don't know the orientation...