It becomes harder and harder to make friends and maintain the constant friendship we already have now.When we grow older,the people around change as well.Some get married and start their own family.(good condition---with a new baby to take care of,more focused on their money,etc) while others may still struggle with their career and get stuck somewhere in between.They're pretty busy,aren't they? Wrong! That's all the excuses.Time can test everything and it tells you who is the right person.Take me for example,I have turned to be 31 years old this year and a lot of so-called friends have disappeared because of the excuses.When I am in trouble,only one people stand out and offer his help.That's my alumni.He is so kind and always ready to help.When he needs some help, I am ready to offer mine,no matter how trivial it is.I never change myself for anything.I am what I am.I have my own personalities and ideas.You do not have to change yourself so as to win the preferences from others.Friend is a two-way thing.It's about cooperation and happiness between you and me.We share,we get,we grow.
I am pretty sorry your question is totally meaningless and wrong.If you lower your standards for friendships,some people is gonna take advantage of that and lead you into a wrong way of doing things.You are gonna become bad afterwards.As I said,time can test everything.I won't say you are bound to meet this kind of person,but it is always be better to be careful about that.
As to making new friends, you can take part in some volunteering work organised by the local government or communities.You can also take a part-time job in food and beverage industry,which is often easier to find.There,you can feel safe to make new friends.
Last word, Learn some knowledge and pick up some skills when you are young.Find out what you really want to do and get some certifications.With those in hand,things are gonna be easier for you.