Important decision advice please!?

ok so when we moved into my new place that is on the third floor this really cute guy started helpin us...and him and i firted back and fourth the whole time and everything..then when we were done unloading he went home...so i really like this guy and even when i just see him in the parkin lot or somethin iget the worst butterfies in the world...im not sure if hes got a girl or not tho..but the other day i saw him workin on this truck at his apartments..sooo i was think i would write my number down and put it on his parents truck in the middle of the night...do u think thats weird or stalkerish..please be honest!