Sexual weekness. Am having few concern?

Hi Doc's, I am having few concern regarding my sexual life. Working in IT , doing irregular shifts. I am too much porn addicted and do masturbation almost every day. I feel quite soft when i perform the activity and take lot of time. Its been more than 5 years that I have been physical with any girl. But recently when i was indulge with sex with a girl i was not getting stiff and i felt my genitals were too soft and was not consistent to keep it stiff enough for a long time. Am really concerned about this. Even after doing foreplay also am not getting stiffness. Also i see the sperm   quantity is too less and not that white in recent days , its too waterly. Below are few points i want to add if it helps . Please suggest . Need quick support because visiting Bangkok  soon 😅😅😅. 1. I smoke around 7 to 8 cigerrate per day. 2. Consuming protien as am working out these days. 3. Having high cholesterol .