27 year old.... I'm 18... creepy?

My 16 year old sister has a guy friend who is 17 ( josh) and josh has a male best friend who is 27. My sister and josh have been friends for 5 years. Recently josh asked me if his 27 year old friend could add me on facebook i said sure not thinking anything about it. Come to find out he likes me! ALOT! its weird.... anna knew joshs pword to his email so we got on there and the 27 year old had sent him links to like every move I made on facebook..... and he wrote love poems (not gross ones) about me. He wants to meet me even though he knows, because I have led him to believe, that I really like this other guy. Once he heard that he slacked off on some of it but still wants to meet me and talks to me alot. Hes not creepy when your talking to him.. actually quite sweet and nice. Doesnt say suggestive things or call me sweetheart or anything like that... so I dont know if he is just some poor guy that likes me or if he is a creepy stalker...