What kind of mentality is it that love is difficult to open in my heart?

Love is difficult to open in my heart, which is a very embarrassing state. It is said that if you love someone, you should open your heart and tell him directly, which is more efficient and time-saving, and can also directly promote the relationship between sons. Then it's hard to talk about love in your heart, which is a bit embarrassing, that is to say, you like this person very much, but you are embarrassed and can't bear to talk. It is possible that opening your mouth will destroy the relationship between two people or make the other person feel a little embarrassed, which is also a state of mind that you are afraid that the other person will reject you. Therefore, this mentality is more tangled and uncomfortable. Well, it's a state of mind in which people don't know what to do.