Should I invite my friend's friends that I don't like?

Not absolutely necessary!

If suppose your friend makes a request to invite such a friend whom you don't like, don't hesitate to invite him. Because sometimes that could be a good opportunity to view some good aspects in that person and there by you may start love him.

Actually no one is absolutely good or absolutely bad, only relatively they appear so.

Of course, it will be very difficult to love every one in this world.

But constant practise would take us to such a stage to start loving whom so ever we come across.