Things/rules about friendship that is to be remembered.

Friendship:

You don't need a list to remind you that you are a close friend and is loved. It doesn't matter what number or order you're in, or if you are even forgotten about in that small list. As long as you are aware that you're a good friend, that's what matters.

You most likely aren't their only friend, and it's most likely that they aren't yours too. You have other friends too, so try to avoid being jealous because it's the same if they have other friends.

If they ever drift apart, it's your choice to bring back the bond you had or release them from your grip, and it's their choice if the feeling is mutual. "sometimes friends come and go."

Try your best to be confident with your friends, and remind yourself that you are as important as any other. The love should be evenly balanced. So order doesn't matter, quantity doesn't matter, all that matters is how you think of your friendship and how you deal with it. Sometimes your perceptions on you being a good friend is underestimated, and that's where moving on comes from. As I said before sometimes friends come and go, that's okay. Life moves on and each new day is filled with sunshine and moon light.