Should I ask her out?!

🏳️‍🌈Kiana🏳️‍🌈 • Bisexual/ love to give advise
Okey there is this girl which I have a major crush on she is cute in my eyes. Anyway we've known each other for almost 2 years now and she sticks in my mind. Once we had the talk of going to the next level and agreed not too. I have real strong feelings for here. 
Recently I've been talking alot to her cousin she is so much younger than me and I don't like her in that way?!
Now should I ask herself out?! She might think i like her cousin, and i don't like her that way. 

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