Being a reliable friend will help you to obtain friends. If you want reliable and trustworthy friends then you need to have the same characteristics you look for in reliable friends.
Build all your friendships and relationships in general on trust. Trust is the foundation on which honesty and loyalty are founded. Trust is established by being committed to the relationship, understanding the other person, their wants and needs and also by being benevolent
Step2
Let a friend know that they can depend on you and that you'll be there for them through the good and bad times.
Step3
Always be ready to give a helping hand if you can and let your friend know that their well being means a lot to you.