Signs your spouse is suffering without you
Multiple dating apps: the reason why they do this is because they have a fear of being alone
Changing lovers: the number one killer of relationship is complacency and boredom your ex or spouse will get bored very quickly in the new relationship
Spend most of their time dating and not working on themselves. The reason for this is because your ex a spouse needed a distraction from themselves to keep them away from the pain of the previous relationship
Posting sad relationship quotes: anytime you see your ex or spouse posting sad relationship quotes on the internet they're reminiscing and thinking about the relationship you had with them.
Starting a smear campaign about you: this is the definition of a smear campaign: a plan to discredit a public figure by making false or dubious accusations.
Always talking badly about you to their new lover and playing the victim.