In the world

There are people whose personalities don't match to me.
I don't think tha I can get along with everyone.
But I hope I don't hurt my friends, and I don't want to make people uncomfortable.

(There are people whose personalities don't match me)

I think it is natural to have this kind of feeling. Just try to be neutral.

(I don't think that I can get along with everyone)

This is also natural. I think it is impossible to please everyone you know. I think what is more important is the people around you that understands you and provides you the support when you really need it. The best you can do is learn and understand why people are different. It will make you feel much better.

(But I hope I don't hurt my friends, and I don't want to make people feel uncomfortable)

This is perhaps your best quality. It shows that you are considerate of others.

Hopefully this helps!

In the/this world

There are people whose personalities are different from mine.
I don't think that I can get along with everyone.
But I hope I don't hurt my friends, and I don't want/intend to make other people uncomfortable as well.

In the World (capitalize titles, but small words like 'the' aren't necessary')

There are people whose personalities don't match to me mine. *
I don't think that I can get along with everyone.
But I hope I don't hurt my friends, and I don't want to make people uncomfortable.

* You could also write:

There are people whose personalities are incompatible with mine.