Is he trying to blow me off?

Me and a guy talking lately, we live in a different countries, still we never met in person.

We were texting today, I told him:

I wanna visit the country he’s living in on my Birthday.

Conversation:

Me: I’ll come on my Birthday for a visit

Him: when is your Birthday?

Me: December

Him: Nice

Me: Yaa

Thats it, he didn’t ask anything else! Like he didn’t say ur welcome, or I’ll be happy to see you.. nothing

That’s all he said! “Nice”

Is he trying to blow me off?

I felt he’s not excited or interested