Love trusts, it isn’t suspicious without cause, it doesn’t assume the worst when there is no basis for the assumption, it doesn’t take gossip as fact.
When there is no trust in a relationship you end up frustrating the one you supposedly love. You will end up trying to monitor their every move, checking their cell phone to see who they’ve been talking to, in extreme cases it might even lead to stalking your spouse and all this might be even based on false assumptions.