So theres this guy I barely know...?

Thats not weird at all. i like short and not the muscular type guys. my friends always make fun of me but oh well. well maybe you should just walk past him and cough or something. i did that to my crush and he said "are you okay." and i replied with "just a little cold." and he started this whole conversation about him being sick and it leaded to a whole hour of talking. or you can maybe bump into him lightly. dont like over attack him. he wont like u for sure but just try little things.