Everyone lies. Whether its a small white lie, "with-held" information/half truths, or the shockers. Its bound to happen by both partners.
With that being said, to me trust is knowing that at the end of the day neither of you will go to bed until all issues are reselved, that even if being lied to or doing the lying it doesn't mean you love them any less/trying to intentionally hurt them and that no matter what the current circumstances may be, you will be there for each other always.
Breaking trust doesn't mean the love isn't there; if you were trying to intentionally hurt your partner, what would be the initial reason for the relationship anyway? It just wouldn't make sense. You must also trust that your partner understands you, just as everyone else, has limits. When forming a deep meaningful relationship, both must have a mutual trust from the very beginning that you will equally putforth every effort you can to make it work, as long as the effort is always recipricated. So, if one continually is hurting the other, making the same mistakes, and although attempts have been made to solve the issues at hand, they are not doing their share as a loving caring committed partner, that's when the trust in a relationship setting has been exhausted.I do not believe in the "three strikes, yourre out" rule, as we are human beings, we are imperfect make mistakes and often hurt others, more often than not it happens to be the ones we love most. We are not athletes and I don't think relationships and/or friendships should be treated as such games.
Just my opinion, hope I worded it right, it made sense in my head lol. This is generally how my current relationship is. His views vary from mine in a few areas. Mainly because of double standards of course -_- lol.