Relationships are tough. Probably 90% of relationships end if we take into account dating relationships that did not click. This should either tell you to remain single or that relationship success must be intentional, not just a luck of the draw.
One way of staying focused on maintaining a connection with your mate is to seek out training. Just as you would train to do well in your job, successful relationships employ skills that can be learned. But where can you learn these skills without devoting a lot of time, energy and money - all of which can be in short supply.
The easiest, least expensive (it's free!!!) and best source of information can be found through subscribing to the Marriage Minute. Brief descriptions of a single skill will be emailed to you on a weekly basis. You can learn more about this at https://www.gottman.com/the-marriage-minute/.
There is really only one problem. You really have to do more than read the skill; you must practice it over and over until it becomes second nature for you (and hopefully your partner).