Should I talk to him on FB?

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Well, this is going to sound really bad but last week I got terribly drunk and this guy helped me out and helped my dad take me to the car and even put me in. I'm really appreciative of him doing that and think it was really sweet. He recently accepted my friend request on FB and I want to thank him and stuff but I don't want to come off as weird or anything as we've like never spoken in real life.
Any help would be great, thanks!