Probably one of the biggest relationship trouble signs is when your partner is forever comparing your relationship to one in their past. Whether it was a good relationship or a bad one, no one wants to be told that their current relationship reminds their partner of an old failed one. Many times, this also means that your partner has many unresolved issues from both their past and their past relationship, so yours is never going to work until they’ve dealt with whatever issues they have yet to get over.