Question: how to know if your relationship is not meant to be?
Answer: TIME. If your partner does not enjoy spending time with you, or always has excuses to avoid spending time together, it's possible that they don't feel like you connect with them how they want you to. ... 
COMMUNICATION. ... 
CHEATING. ... 
LYING. ... 
NEGATIVE GETTING WORSE. ... 
LACK OF SEX. ... 
LACK OF AMBITION.