Is it ok to lie about my age to get a girlfriend?

Let's say I like a girl but she's 16 or 18. She might date a guy that's 20 but not 24. Is it okay to lie and say I am 20 or 21? Eventually, when she very much likes me, my real age shouldn't matter. What do you think?
Is it ok to lie about my age to get a girlfriend?
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