Is it weird to ask a boy for their number?? Please help

Please read this and leave your advice!! I'm begging you, this is a pivotal moment for me! 😩 Ok so I have a crush on this boy in my high school, he's a senior and I'm a junior. We don't know each other at all but he's checked me out a couple times I've seen from the corner of my eye. I'm so shy and it's hard for me to make flirtacious eye contact with boys I like. But I'm going to make 2017 my year and stop being so scared. My plan is to time my walking so that when I pass him in the hallway, it's mostly empty and I can make my move. So here's what I'm thinking: I'm gonna dress as cute as possible tomorrow and get enough sleep so I don't look pale and dead. Ya girl has to glo up in one day 😂 ANYWAY, please tell me if the rest sounds good and tell me how I might want to modify my plan: I'm gonna make eye contact with him and say, "Hey, wait a second." We're both gonna stop walking and I'll get closer and friendly and say, "I see you in the halls sometimes. Your name is ___ right?" (I don't want to put his actual nane). Then he'll say yeah, and I'll dig deep and say, "Do you think I can have your number?" And he better give it to me. Failure is not an option. What I want to know from you ladies is if this sounds good or creepy, or what would you do?? Before asking for his number, I was thinking of saying, "I see you around the halls and I thought you were so cute" or something along those lines, or does that sound like too much of a thing a boy would say? Do boys even like to be called cute?? Maybe I should say "good-looking" or "attractive" instead?? Please please help me!! I am so so so inexperienced, you have no idea! 😫😫 I'm really putting myself all out there tomorrow because I have to stop imagining and fantacizing about a relationship with him, and actually try, because time is going quick and he graduates high school in 5 months! Do you think asking for his number will leave a good impression? Also I'm not the type to message him through Instagram and Twitter, I want to start off a potential relationship with a bang by just askigg. I know this was long, but please offer advice and anything you can think of to help me, I really like this boy and have to stop being so shy this year!!