There are some very basic things that can actually help keep a relationship alive and happening and happier. We just often tend to ignore them because they are plainly so clichéd. But, they actually work. And these are:

• Praise your partner more often. Not just looks, but anything she does well or is trying to be better at. Be it her hobby, her work, the way she handled a troublesome situation, or be it an occasion when she saved you from trouble. But don’t overdo it. Appreciation works only when it’s genuine.
• Help her to improve (if you can). Maybe you had a fight in the morning but by evening you were settled down and happily talking to each other. At that moment, you can calmly tell her if there was something she was completely wrong about. But again, the method of telling should be very easy and calm, so that it doesn’t start another fight again. And be frank in accepting your own shortcomings too. That is how you’d end up having a long and sustainable future together.
• Keep gifting each other occasionally. Even smaller gifts are fine. It need not be necessary a clichéd gift like an iPhone or a Necklace. Smaller and cuter gifts also work very well many times.
• Create a habit of spending time together engaging in non-materialistic things. Expensive restaurants, movies, malls all are fine, but having a quiet walk in the park with both of you holding hands and discussing life feels soothing to the heart.
• Help each other in basic tasks. Cooking is a very good example. You can think of many other household chores that you can do together and with each other’s help. This helps build a strong relationship.
• Accept each other’s differences. Maybe you like rock music and she likes EDMs. Maybe you like comedy and she likes romance. Sometimes it’s hard to watch a movie that you don’t like but she does, but try accompanying her. Accepting and respecting each other’s differences is extremely important, and it’s fun too (sometimes).
• Apologize. Accepting mistakes and acknowledging them not just makes the relationship better, but it also makes you better as a person. You can choose your ego (by not apologizing) if you don’t want your relationship to last long. But if you want her forever, then apologize and work upon your mistakes.
• Create something for each other. Now, this is hard to explain. Like you can try writing something for her. Try to paint a picture of her. Bake a cake for her. Or you can just make a video of each other. Do whatever artistic thing you can do. These things last forever in your hearts. Keep doing it.
• Have a secret world of your own. Again this is hard to explain. There should be a few things which only you two know. Maybe a codeword to exit a place. Or maybe a way to convey something to each other without saying anything. It can be anything. The principle is that it should be something that only you two know, and no one else. Try it, it is super fun.
• Talk. Conversations keep us going. Talk with each other as much as possible. Share things, opinions, experiences, and whatever you wish to. Although sometimes you just need to be silent and hold each other’s hands. But that is also a way of talking (or basically understanding each other’s). If you can keep talking with each other in any situation, then you really understand each other very well.

And one last thing, and I don’t know if it is right or wrong. But know one thing that you two have your own world, but it’s not just you two in that world. In the initial days, it feels as if your partner is everything. But as you live along, things can change, and that is natural. Maybe her priority may shift to children, or your priority may shift to work. That is fine and is bound to happen someday. But always try to keep things in balance. Don’t start ignoring your partner altogether when you’re engaged in children or work. Balance things out. Spare time to spend with each other. Doesn’t matter if you are 25, 35 or 75, if you can keep doing those little special things for each other, you can stay lovers till infinity.