I want to end my relationship.

I've been in a relationship for 8 years. It was going fine for the most part, but lately I've been feeling like I want to figure out who I am as an adult without a boyfriend. Hes also been out of a job for a year, and when he does look he hasnt managed to find anything. I've been working 2 jobs for the last 8 months just to try and cover our expenses. It's stressing me out because I can't imagine not spending my life with him, but I also don't see much of a future. I find myself more frustrated with how everything has been going, I never see him anymore as we're on different sleep schedules, his drinking problem has gotten better to the point where when he does drink he just does it to relax, but it still makes me sad. I'm not sure how I'll even bring this up. I'm royally fucking him over, he'll have to move into his sister's place or find his own in town or out of town in their town, but then they have to move all his stuff and it's winter. I love him, he's a kind and caring guy, but I'm not happy. And I know he'll be pissed when I bring this up, but I don't think I can do this anymore. I don't know when the best time to tell him is, or what to say. I'm stressed and anxious anytime I consider doing it.