Do what you think.
I don't think it's cruel.
We humans need other people for proper and healthy functioning.
If you feel the need to meet new people, I don't see a problem.
Locking yourself in your own cage is not the solution. I know something about it.
You can make your last few months more enjoyable.
I don't think you should worry about it and enjoy the time you have left.
For example, last week I met my childhood friends (I VERY rarely meet anyone) and I have no complaints.
Maybe this was the last time I talked to them, but at that point I didn't care.
I didn't think about my impending death and just focused entirely on the present.
Approach your new friends in the same way.
Enjoy the moment.