1) Don't be sticky.
Respect the personal space..Most people value their personal space and feel discomfort, anger, or anxiety when their personal space is encroached.
I understand that you are friends, but this doesn't mean that you have to stick to your friend where ever he goes or interfere in his personal matters.
If he wants to share something with you, he will do.
2) Have your own personality.
Don’t try to be someone you’re not just to fit in.
Friends should accept each other as they are!..friendship is all about feeling comfortable and being you,not fake.
3) Be a friend one can count on.
A true friend is hard to find , try to be this true one!..be by your friend's side during his ups and downs.
4) Share the sad moments.
Let your friend help you and stand beside you when you are in a bad time, friends love to do that, and this will strengthen your relationship.
5) Conflict is a part of the friendship.
Friendship isn't all sunshine and rainbows..you should be willing to accept the conversations with friends. But you have to handle it, don't let the conflict end your friendship..grow up and handle the conflict wisely.
6) Share passion and success.
Be positive, help your friend to succeed and achieve his goals, don't be this type of people who let others down.
Be a good companion to your friends.
7) Don't gossip.
Don't ever gossip about your friends, even if you are having a conflict with them or your friendship then is not going so good.
8) Show respect.
Who said that friendship is free of respect? who hate to be respected?
Show respect to your friend when you are with strangers, or with a group of anonymous people.
9) Appreciate the little things.
Not only the big stuff that should be appreciated, but also the very little things.
showing appreciation is one of the most common problems in any relationship, not only friendship.
10) Love the family.
Try to be a member of your friend's family, this is a common mistake friends do! they don't care to have a good relationship with their friends' families.
If your friend's family loves you, you will be welcomed and you will feel like you are a family member.