You give up when you come to the realization that this person just doesn't give a crap about me at all.
The more you like someone who doesn't like you, it just feels desperate and sad.
From last June to early February of this year, I liked the same woman (I met her at my current job).
She ended up moving to my department last July to be one of my supervisors.
It took until this past February really, to come to the realization that not only is she not attracted to me but she also doesn't care about me period.
She's a user.
She would only really text or call me when she wanted me to work a 6 day.
Well, I'm already full-time as I work Mondays through Fridays. I'm 40 hours a week.
I told her to her face that I would only really work a 6 day, a Saturday or Sunday, because I wanted to see her.
I didn't care to make extra money.
She would even ask me to work a couple hours or so after my normal shifts end.
One time I did that after she asked me and I heard her tell someone, "I'm going shopping."
I'm staying at work when my shift is suppose to end to keep working while you get to go shopping?
She would blow off some of my text messages and not even apologize to me about it.
She even found it funny.
I asked her out 2 times.
The last time was to see a movie and she told me to see the movie by myself.
That was last November or December of last year.
I surprised her with birthday presents last October which she told me that she loved.
I told her to her face how much I liked her and thought of her and even wrote my feelings about her in a birthday card that she read.
She just didn't care.
She went from being happy to see me at work and wanting to help me when she first became a supervisor at my job to telling me, "Why do we have to talk?" and "What do you even want to talk about" and "I don't like how you're following me."
She still wants me to work on Saturdays when I don't even talk to her anymore.
I'll talk to her older sister who is my other direct supervisor who I get along with greatly.
When she tells me to do a task though, I'll do it but I don't care to be nice to her or respond to her.
You just find out for yourself that you're tired of liking/being nice to someone and realizing your wasting your time.
I hope that I've helped answer your question and take care of yourself. I mean it. ~Alan