Any advice on asking her out (16, M) (18, F)?

I have known her and her family for 13 years and they have a brother my age that I am close friends with. Her family knows I like her and wants me to ask her out and mine also support this as well!

There are times when I just grab her and sit her down on my lap giving her shoulder and neck kisses and she giggles. She gets all blushy whenever I touch her.

She won’t be moving away for college she’s planning to take a gap year then go to the campus close by and I will also be going to a campus close to home so we won’t be living in the dorms.

I already know she loves and cares for me and her brother said so but I want to do something extra special for her.

Any advice on asking her out (16, M) (18, F)?
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