The most important thing in a relationship is that you care for your partner or not. It should be a mutual feeling. There are loads of simple ways like just by remembering special occasions, what your partner loves, what make them happy or a lot more things. So if you are looking to do something special for them, then you are at the right place.
Here are some easy common things which you can do to make your partner happy.
Tell them what you love, if you love the way he kisses you let him know. Also, how you feel about being with them.
Say things like, you are precious to me or I want to spend the rest of my life with you if you mean it.
Tight Romantic hugs for no reason.
One of the most romantic things in relationships.