Hello Liyla
It would appear that some very successful relationships begin as online friendships.
On the other hand, some people are not who they seem to be.
Paedophiles & conmen have befriended females, who they have met online, for evil purposes.
This may be a nice young man, with whom you could get on very well ~ but you cannot be sure of that.
I would suggest that, if you do decide to meet up, you do not go alone.
And it would be worth finding a way to check him out & get to know the real him, before you take things any further or spend time alone together.
If you are a minor, you should discuss this with your parents.
Unless & until you meet & get to know each other, you cannot know how things will go, so he's probably right to be unsure.
Good luck ~ and be careful!