Community medical question

Im having problem with my penile erection for one and half year. Im Afraid to go to a doctor. The problem is when ever I go near a girl my heart beat increases and my arm and legs become powerless or weak for a moment. And I have a weak erection. I also have a stress or fear for nothing while driving. Choti choti bat pe dar lagta hai. Or mn es wja se kafi preshan hu. Shyd mn depressed hu esi wja se esa ho rha. Meri sex life kafi effect huwi hai es wja se libido b zero ho gya. Phle wali feelings nhi ati or na je wese erection ho rhi. Kindly help me in regards.
Thanks