How frustrating is it to try and do everything right in your relationship only to have the other person continually side-eye you with a look of suspicion? No relationship can exist long-term without trust. But, so many people carry baggage from previous relationships that make them doubt a new love.
For those of you who don't seem to know how to trust, allow me to offer some assistance:
Let it go
Don't play Sherlock without a reason
Ignore the whispers
There will be
|That Mr. Furley side-eye!|
In conclusion, good relationships can't exist without trust. If you're not willing to trust the person you're dating then why are you wasting their time? (Yes, I said "their time.") Good people get into relationships with the expectations of their good deeds being reciprocated. If you're not willing to at least allow them the chance to mess up on their own, then you're never going to be happy in any relationship.
Can a relationship exist if one or both people are suspicious of each other's actions?