I Don't Know What To Do...

So I am chatting with a guy on facebook for a month, he said thar he added me because we have mutual friends and because we work in the same field I am a pedriatic nurse and he is a dentist and he said to me that he really likes my photos and would like to know me and meet with me at a coffee but the thing is we live in different towns at 300 km away and I don't know if he would be willing to drive that much for me I am afraid that he only wants only to have fun with me and I would hate an one night stand because I am 25 and I only had a 3 year old serious relationship. He is 35 and never been married, never had kids and when I asked him about his previous relationship I felt that he wasn't honest and was hidding things and if he wants to get me know better he should know that I hate liars.I am kinda curious to know him more and meet him but I really want to know if he is a good person and doesn't have a dark past. Sometimes he seems really impulsive he speaks too much, speaks about his work and parents and how his day was going on, he kinda seems more interested in his own person, I don't know I may be wrong I don't know the guy we only chatted and spoke on the phone.
He never said anything wrong to me, like dirty talk he seemed well mannered, I just hope he isn't a psycho or if he is just a totally jackass married with kids, but this I can't know I just have to trust him and I don't.
I don't know what to do with this guy he seems to really want me....