Suggest Remedy For Anxiety And Depression

I am 21 years old. B. Tech student 3rd year. I am very negative thinker and with each passing day I am totally loosing my self confidence. I don t talk to anyone in college especially girls. I feels everyone ignores me. Totally depressed even i don t talk to my parents now. I have not much places to go due to my bad attitude. Upto +2 i was very excited with my life but now no hope. I lost my interest in life. Sir please help me. And sir please don t share my personal details and name. I am writing for your reply