If your partner does not feel appreciated, then that is when resentment starts to build. When resentment builds up, it inevitably leads to fights and screaming matches.
Couples in long-term relationships tend to stop hearing (and giving) compliments regularly. You get so used to each other that you do not feel the need to tell each other how attracted you are to one another. Even a very small compliment like “You look good tonight” can go a long way.
A healthy sex life is an important part of an intimate relationship. It does not matter if you have been married for 10 years or dating for 1, a healthy sex life is crucial to making a relationship work.
Whoever said that “sticks and stones may break my bones, but words will never hurt me” was clearly not in a relationship.
The way to avoid this is to try and be spontaneous. If you usually eat meals at home every night, try taking your partner out on a spontaneous date to a restaurant.
It is very easy for one or two influential people to really destroy an otherwise healthy relationship. If you notice that there is a toxic influence on your relationship, then you should move to cut them out.
A big issue with many relationships, especially ones where the 2 partners live together, is that it can be hard to find time to do things on your own.
While practicing your own hobbies and setting aside time to do those hobbies is fine, you should also make sure to have some mutual hobbies with your partner.
If your partner is doing something that you do not like, the secret is not to just lie down and accept it. You should set strict boundaries and let your partner know that whatever they are doing is not acceptable.
When your partner wants to vent, they will likely come to you first (unless you happen to be the source of the frustration, but that is a whole other issue).