Should I get over just because he has a woman?

So i really like this guy who is 10 years older than me. Im 18 and he's 28. He has a relationship for 9 years with a woman. I flirt with him in a not obvious way like actually telling him i like him and he flirt with me but never tells me he has a woman. I really like him and have feelings for him. What should i do?
Should I get over just because he has a woman?
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