Friendship Phrasal Verbs:
1. Get along (with somebody): to have a good relationship
E. g. I get along well with Jack.
2. A knight in shining armour: someone who saves you from a difficult or dangerous situation.
E. g. Sam is my knight in shining armour!
3. Make up: be friends again after a quarrel
E. g. Come on! I am sorry! Let's make up over a cup of coffee?
4. Birds of a feather flock together: if two people are birds of a feather, they are very similar in many ways, so they naturally spend time together.
E. g. No wonder they get on well. They're birds of a feather!
5. See eye to eye with someone: if you see eye to eye with somebody, you agree with them.
E. g. I'm glad we see eye to eye on the choice of colour scheme.
6. Know someone inside out: if you know someone inside out, you know them very well.
E. g. Sue and Anne have been friends since childhood. They know each other inside out.