Help! I accidentally gave someone the wrong number. What should I do?

ElinH
So I met this guy at a party over the weekend but as I was drunk I accidentally gave him a wrong number! He added me on Facebook the next day and I accepted him but he hasn't send me a message through chat.
Meanwhile one of my friends (the one that introduce me to him) said she talked to that guy's friend and his friend said that he has been texting me.
I am not 100% sure that he has been texting me and I don't know how to approach this. I am not comfortable with sending him a message on Facebook because he might not have been texting me at all. Also, I liked his profile picture today but I didn't get any signs from him.
According to his friends, he is interested but because I haven't talked to him directly I don't want to jump to conclusions...
Bottom line, I don't know if he is interested but why would he add me on Facebook if he wasn't?
Any tips on how to get his attention?
Help! I accidentally gave someone the wrong number. What should I do?
5 Opinion