I don't think it's important to write a love letter or send a text message to bless you. Form is important, but it is most important to express your inner feelings sincerely and sincerely.
Besides, you are very interested in him. Give him some encouragement and hints on his birthday. Implicit hints, so that he can receive your mind, in case he doesn't like you, he won't embarrass you two in the future.
Suppose you have done something memorable recently, such as watching a meteor shower, I will say "I hope to watch another meteor shower with you sometime tomorrow" and so on. If you have played basketball recently, it means "I hope you will teach me basketball next time", which brings back recent good memories and gives you a prospect for your future relationship.
I remember when I was in high school, on the first day of my freshman year, I wrote a sentence on the blackboard, "Qingqing is proud, but I am worried about you, but I am still thinking." The monitor came in and saw that he was a man who knew poetry. He deliberately asked me how to pronounce the word "poor". I just like it anyway. Later, we didn't develop, but once I asked him, "Do you remember Qingqing lac?" He said he remembered. Later, I transferred to another school, and everyone in my class folded me a star and wrote a sentence in it. The monitor says, "I especially remember the moment when I was green."
After many years, we didn't contact, but we felt that the faint goodwill at that time was very beautiful. What I want to teach you is to write down this faint feeling. It doesn't matter what the specific word is, just concentrate on expressing it. Don't expect a short message to change anything. It is enough for a person to express his feelings and the other person to see your heart.
Be flexible. Amen.
If you think it is good, please give it to me quickly. I am a romantic. This is a piece of cake. But I can't deal with interpersonal problems. I am sad. I'm anxious for your share. I will ask someone else to answer my question soon.
Welcome to ask questions.