help me, she is all over my head :(

hello guys, i am a 24 year old guy working at a certain IT company. I am a shy type of person, and dont really talk to girls :( (Ok, i talk to girls that are not interesting to me, but to those girls that I am attracted to, that is where the shyness comes in). I dont have friends that I hope will listen to me because its really embarassing. Ok now, in the workplace, I have this crush on my manager (33 years old). She is really attractive (for me at least). On some occassions, she teases that I am like a "child", sometimes taps my hair (like a mother would do to her son/daughter). Also, I think that even if I dont look at her, i feel that she is looking at me (or at least I am dreaming maybe :( ).Sometimes, we end up looking at each other. And when sometimes we see each other, she says hello to me and it makes my day (because I think is a lot different when other people say hello) Everybody in the office knows I have a crush on her because they notice that everytime I am near her or she comes near to me, I blush a lot. My office mates cracks joke at me all the time because of this infatuation toward her. I think she knows it too that I have a crush on her and sometimes would directly tease me that "why are you so scared of me" or something like that. Now as time goes, when I am alone, i think of her. Also in the office,I feel sad whenever I see her because I feel that I dont have chance at her (we have very far career levels), and I am thinking that I will just be rejected. Also I dont join team outings, parties, this things. I am trying to make distance with her. Also, i am scared that one day, she will have a boyfriend and I think it will be very frustrating for me. Now, I am thinking of quitting the project. (Note: I love the kind of work I do at that project, but whenever I see her, I become sad, the quality of my work changes and my mood swings a lot that I get mad at my team mates for some reasons, that I release my frustration on them) please help me on how i can manage my emotions. Right now, i am just thinking og quitting my project and move to some other project so that I wont see her anymore.

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