If both you guys don’t doubt each other and have trust between the two of you it means your relationship is going to stand the test of time.
Any problems or issues in the relationship are kept inside the relationship. You two make sure not to involve friends and families in your relationship.
Your interests & life goals align with each other. You have had the uncomfortable talk regarding money, lifestyle, children, & annoying habits.
Couples who have long lasting relationships know how to handle conflicts between them.
When you can count on each other at bad times and have an overall positive image about your partner.
If you're with the right person, though, you can share bad news: You know he'll listen, commiserate, empathize...
Even if you're not getting it on every single night, showing even the slightest form of physical affection can keep the relationship strong.