Is it ok for me to say hello and include my name on my Facebook profile for a guy who's birthday is near mine?

I was just browsing on Facebook and saw one of my friends' profiles and went through his profile. . saw one that also caught my eye and his profile only said his birthday was on 14 of July and yep he is younger than me. It might be 18 at the most. I think I Saw his Sister or could be his mum. not sure about that. has same last name that i sent a text to the guy. My birthday is July 15. In fact, it put me in a weird mood. He didn't mention where he went to school or college. now i am just waiting for him to reply to see wait and see where we could go. I was also excited about seeing another guy near my birthday.
Is it ok for me to say hello and include my name on my Facebook profile for a guy who's birthday is near mine?
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