How do i get my friends to watch mlp?

Keep in mind that after they give it a decent shot and if the say no, let them be. You don't want to be one of those overbearing bronies, do you? Anyways, maybe show them some fan works of our like our music art, animations, memes, etc. which goes way above and beyond most other fandoms. Other than that, nothing like showing them the actual show! I'd suggest Lesson Zero as it introduces all the main characters, has good character development, is key to the recurring themes of the show (friendship letters, their close relationship with the princess, etc.), etc.

I hope I helped!