I have a crush. Should I reach out to him and how should I do it?

There is this banker that stares at me a lot when I go to the bank.
Although I've spoken to him years ago when I was getting an account at the bank; his face kinda looks familiar...like I known him all my life.
I can even tell when he's standing behind me; talking to other customers from his voice.
I developed a little crush when he started staring at me sometimes but it wasn't a serious crush...something I forget when I get back home.
What broke the camel's back was that I saw him again at a food bar in my neighborhood...I began to think this was God speaking and that he's my soul mate. Silly!
The little crush turned to this huge fountain that i can't seem to shake off my head. I begun asking myself questions; whether he lives in my neighbourhood, is he married, dating, does he like me or just like how I felt that his face looked familiar; he also feels he knows me somewhere.
I couldn't say even hello or Hi when I saw him at the food bar cos I was surprised, nervous and more other things. I just stared him up and brought my gaze down as I quickly passed by. He looked in my direction too.
So the serious crush developed after that day and I finally decided to gather up courage and say Hello or Hi if I meet him. I 've been going to the food barthe same time we met like everyday...even when I didn't feel like eating food there:( but no sign of him.
Since I've not been seeing him; i decided that maybe i've taken things too far. If he also liked me he would be at the food bar trying to see me too.
I decided to forget but I couldn't...so I contacted facebook with my problem.
I know right...You'll all say I'm a big stalker:(. Through facebook I even found his name and to my big surprise; he's the brother of an elementary collegue of mine. We were not close though but friends on facebook.
Also, It was true he lived in my neighborhood. I guess that is why his face looked familiar. His facebook relationship status also said he's single.

To cut a long story short; I did not add my crush on facebook till now. But for weeks not I have not seen him around in my neighborhood. Now I don't even know if I should reach out first. Also, I'm not even seeing him and I cant go to the bank cos I have no business there. Should I send a friend request? Won't that make me look like desperate and stalky? Also do think he likes me or just thinks he knows me somewhere? i need help?