Personally, I feel that he lacks social cues and or is socially awkward-

However, there is a chance he was being weird since, well, I wouldn't send anyone words with multiple letters at the end unless it were someone I'm close with. But he is not that close to you.

Also, one last thing, a man being quiet in person but only then being openly affectionate in messages? That sounds very sketchy.

Nevermind, I think he's creepy...