I'd like to play with my friends.

Without any concerns.
If it is ocurred, I should have been the happier guy in the world.

The sentences sound a bit awkard, but I think you mean this:

Without a doubt, I would like to play with my friends. When this happens, I would be the happiest guy in the world.

(Context of someone asking you what you *would* choose to do with your time, i.e. a hypothetical response, because you are using "would" by writing "I'd")