An example of negative communication would be anything that makes one partner feel apprehensive, insecure, or ignored.
Is your partner a big flirt lately? Flirtatious behavior with others should raise red flags in your mind.
Ask yourself if your partner's sarcastic responses to you are a normal part of their personality or not. When someone uses sarcasm, it's indication that they're angry.
You may be on the verge of a breakup if you're not talking about personal matters.
A healthy relationship requires open and honest communication, but if they're not happy, they may not want to discuss it.
If they are more content without you than they are with you, your relationship may be the source of their discontent.
They may not be concentrating to the positives in your relationship if they used to tell you things they loved or praised about you but have stopped doing so.
It is possible that your partner's sexual desires have changed significantly over time, which could be an indication of a more serious problem within the relationship.
The amount of time your partner spends away from you has increased significantly? Is it possible that their absences are a little out of place? This can be concerning.