The behavior of girls lowers my self-esteem

I may not have a problem, but a very unpleasant situation. There are many adults here, I hope for understanding.

I am 22 years old. Student, finishing my master's degree. I want to startrelationship , but whatever I try, wherever I meet, I’m waiting everywherefailure . Should I leave this venture and not look for anyone?

I don’t know what to do when we get to know each other, everything is in order, we are friends, we walk, then, after a while, I start to like a person, and I tell him about it, either everything ends, orthe girl abruptly finds a boyfriend for herself, or returns to the former. It puts a lot of pressure on self-esteem, but I try not to despair.

To make it clearer what the problem is, I will describe the situation. Once a week before a walk, I prepare a surprise, whether it's a flower, some small gift, or I do something myself. In general, to be pleasant. I give gifts, I say compliments, I look after. It's just that I get rejected all the time.

I understand that I'm doing something wrong. So the question is: “do you think I’m making a mistake somewhere?”. I really want to take care of someone, I just want to love test-antibiotic.com, but it turns out, I'm left alone.