Suffering from abnormal, strange behavio

From 5 to 6 years, I am suffering from abnormal behaviour. Usually I am very shy person especially when there is boys around me. At their presence, I feel very uncomfortable,fear and unnecessary laugh. I can't even give proper eye contact.But every time, I am trying to supress myself. But I can't control it.They also felt strange about me. Can I know how can I overcome it? Now, I am software employee doing work from home.In future, I need to go to office and I need to interact with everyone.so, I am fearing a lot with my problem whether it continues.1. can I know why it is happening to me 2.what treatment I need to take 3.how long it takes to solve my problem. One thing I can strongly say about me is I am a fearful person and coward. Every day I am fearing a lot about this matter.Every night, I am not even sleeping properly because of this.And my mind is strongly fixed that I am going to face problems in future because of past incidents.so, I request to answer my question.