How to politly be friends with someone you dont like

Answer: Be kind

Explanation: Try your best to not let them know that you don't like them because they might get angry at you and things gonna get worse

Act nice

Explanation:

You may not like them but all you have to do is act nice around them, you might not even have to engage into conversations with them just be a nice person say hello and such and time to time go more in depth, also you can complement them even if it does not seem right to you