There's this guy that was in one of my classes at college and our class would take breaks periodically because it was a 3 hour class. I was waiting in line behind this guy waiting to get a drink out of a vending machine and he started making small talk ("Hey i'm _____. How are you? yada yada yada") I didnt really think much of it, but I thought he was a really nice guy.
About a month or two later, he added me on Facebook, and I accepted. The very next day, he messaged me over Facebook and asked how I ended up doing in our class. We messaged back and forth a few times, once again just small talk, and then he gave me his number and told me to text or call him if I ever needed anything. Does he want me to actually text/call him? Or was he just being polite? It's been a day or 2 since he gave me his number. Now what?