My partner drinks 4 pints every lunchtime and at the weekends anything from zero to 15 pints (or spirits). This has been every single week for about a year. If I show concern or ask him about his drinking he gets angry and closes the conversation down, or walks off. He said he had to drink because his colleagues do and he will look weak if he doesn't. When he's with his friends he's a happy drunk but when he's with me he gets aggressive, brings up stuff from the past and is rude. When I asked if he was worried about his drinking he got angry.