Trust is hard to build if people don't think you are honest. If you say things to either get your way or to please others, pretty soon people will catch on. Get to know your thoughts and feelings and communicate them to others in a respectful way. Make your actions and words match.  If you're going to be late or miss something, let the person know. Don't say you'll maybe be there if you can't make it. Be honest and genuine about your wants, likes, and dislikes and communicate them. For example, don't say you want to eat Chinese food to please your friend, then complain about not eating what you want. If you back out of plans last minute, chances are people won't trust you to do things or won't feel like they can count on you. If you say you'll be somewhere, be there. If you say you'll help your friend, help your friend. Once people see you as reliable, they will begin to trust you and count on you. For example, if someone proposes plans, try not to waver on them too long. You might fear committing to plans, but show that you're reliable and say either yes or no. . Respect goes a long way in building and maintaining trusting friendships. Treat people with dignity and as equals to yourself. How you treat others shows the kind of person you are and whether you're deserving of people's trust. For example, listen when people speak without speaking over them. Don't make everything about you. If you're known as a gossip or someone who spreads rumors, chances are nobody will trust you. Drop this habit and learn to speak to people and about people differently. If you're not sure about something, ask the person directly instead of spreading a rumor. People want to know that you will treat them well and not say mean things about them to others. People notice when you look out for other people and offer to help. Treat people you know and don't know with kindness. Be polite and show up for your friends when they need you.  For example, ask a friend if they need help moving or if they need a hug after a difficult day. Being a friend to someone who's in need can show that you're a worthwhile and trustworthy friend. Being vulnerable is an important part of friendship. By telling your friends your secrets, insecurities, and deepest thoughts, you are showing them that you trust them. In return, they may share their most intimate thoughts with you. It can be hard to open up at first. Start small. Talk about things that are important to you. When the time is right, share more about yourself. It is important that you do not judge or laugh at your friends when they open up to you. Good friends are nonjudgmental when their friend shares something important to them.

Summary:
Be honest. Show that you're reliable. Treat your friends with respect Avoid spreading rumors or lies. Be kind to others. Open up to your friends.