Hes engaged but i like him ?

so i'm a 15 girl i'm like 4 months new to the school i go to and the guy i happen to like is like what maybe 7/8 years older than me , that's not so bad is it at least the guy isn't 47 , ok well the dude is a computer guy at my all girls high school he fixes our laptops, electronically devices and what nots i guess and he is quite the heart throb i mean like nearly every girl likes him like geejuz hes beautiful , amazing and just so damn intelligent it's like dayumm boy you got the whole package but the sad thing is that hes engaged maybe to a pretty blonde bimbo ehh who knows , the guy is really built and i think i lust for him haha ok i should stop rambling on let me get to the point , he always stares at me and i know i'm not imaging this like literally he does like i do believe that i'm an attractive girl and everything maybe he just think's i'm pretty and nothing else and i shouldn't look too much into it but i really do like this guy i just hate the fact that so many girls are after him like i am i wonder if he does like me in a certain way i mean i never had like a conversation with him i wish i could i get so nervous and tongue tied i hardly ever go to him to get my laptop fixed because i like him and just dont want to embarrass myself in front of the guy , i always go to the library just to look at him and sneak flirty glances at him i know i probably shouldn't but why does it look like he likes me he also gives me these looks where he wants to smile , and blushes slightly i do notice he stares at me quite often it's just like now and then but does it mean anything and hes engaged even which sucks i don't know what to do i'm confused am i taking this too much ?