As good friends, ...
Either is fine. If you look OUT for one another, you watch out for things that could cause the other person trouble. If you look AFTER one another, you help that person in their day-to-day living.
Magic, i am not asking you do my homework. I want to improve my english writting skill. I will practice my writting skills by just writting random things on daily basis and when i am stuck, i will come to this site to seek help. I hope this explanation will be good enough. Thanks.