This one is pretty much a no-brainer, but communication is obviously one of the most important factors to breed a successful relationship.

I’ve dated my girlfriend for almost four years now, and after all this time, we sometimes forget to have conversations about us.
It’s important to have these dialogues, however, to make sure both of you are on the same page with how things are going. Because after such a long time together, couples can tend to travel in different directions with each other without even knowing. Not to say that it always happens and that it’s detrimental to your relationship, but it can be a threat and is something you want to address.

Just make sure it doesn’t turn into an argument.

Talk with her.