Wife came out as a lesbian

31m, married for 6 years together for 10 with my 33f wife. 2 weeks ago she came out as a lesbian to me, which was something i suspected after a dead bedroom for 2 years but it still was a shock. We dont have kids despite originally wanting them which is a positive I guess. Im just kind of lost on what to do now. This is my 2nd relationship ever, I havent been with another woman since i was 19. Recently I relapsed into drinking and smoking which havent helped but i just feel so hopeless, its decade of my life down the drain, with nothing to show for it. Ive rented a studio flat and because I cant stand being around her, it just makes all the emotion that ive been trying to get over come back. She keeps trying to reach out to me to "check up" on me but honestly it makes me feel worse and as a result i havent been returning her calls. Thinking about our marriage makes me want to kill myself so ive been getting busy with some old hobbies, fishing woodwork etc but i dont know how long i can keep up the facade, even to myself. Sorry for my shitting writing, I dont really have the energy to make this flow.