2時間後にまたここで会いましょうって英語でなんて言うの？

'Rendezvous' is typically used more formally or in military situations...so if used socially, it may be as a joke!

Since this is your friend you can tell them whichever way you see fit depending on how close you are.

All these sentences are good for expressing that you want to meet somewhere two hours after the current time.

In informal terms, to 'link up' with someone is to get together with them.
Since, you're talking to a friend, it's appropriate to ask them to link up with you at some place.

To say that you will 'catch someone in two' you are saying that you will meet someone within two hours.
This can also be used for saying goodbye to someone eg "catch you in a few."

See ya in two hours is another way of telling someone that you will meet them in two hours.

All these are good ways of suggesting a meeting to a friend.

You can use the sentences above to arrange meeting someone at the same place in two hours.

At the same spot, speaks about a specific place or area.

They are all saying the same thing, just mixing the word order around a bit. So, pick whichever one you prefer and you will be fine.

Sometimes when we go hanging out with friends, and we want to agree to meet up at the same place, we can use anyof the following expressions:-

1. I'll like to meet you at this same spot in 2 hours.
   "Same spot" means the exact same place.

2. Can you meet me here in 2 hours?

3. See you back here in 2 hours time.

You can ask them if they can meet them first of all or you can be straight and just say - let's meet there. The second question is a more direct version because you will put it without a discussion that you are going to meet.