Trust is definitely something important to me. If someone betrays my trust, then it'll take a long time for them to earn it back. Longer than it took to earn it in the first place. However, it really depends on what they did in the first place in order to break my trust. If it was something small such as missing a rendez-vous or other meeting, then I can usually look past it. If it's a bigger thing such as spreading malicious rumors (and they have to be pretty bad) and the like, then I would get angry with them, and not forgive them until the situation has cleared, if at all. If it was a continuous occurence of either big or little things, then I would probably stop talking to them and stop associating myself with them. I know it's kinda harsh, but trust is something I take pretty seriously.