Hey, do you think I should aporoach her?

Hey, I'm a 18 year old male and I like a 17 year old female from my school. When we see eachother at the halls we sometimes look at eachother for a moment and few weeks ago I can still remember her outside at the school, I came out of school and she was there talking with her other friends I looked at her and she was looking at me, I stopped and had a small talk with my friend and when I turned around with my head I saw her looking in my direction. I'm almost sure she was looking at me but there is always this paranoia that maybe she was looking somewhere else or someone else. I really like her and I thought that I could walk up to her tomorrow and say hi and ask for her number or snapchat. So I'm looking for advice on how to walk up to her, should I introduce myself and give her gentle handshake? Should I ask her for her phone number or snapchat?
Thanks for any advice in advance

Hey, do you think I should aporoach her?
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