Friends are not entitlements - they are gifts from God. If you don't appreciate them when you have them, if you toss them away as though they're dispensible, the day will come when God stops sending anymore new friends your way and instead directs them towards people who will appreciate them more. Remember that when you get older, you won't be able to find people who will go on to be in your life for years and years, because you will no longer HAVE years and years.