Finding myself after breakup

Erm.. ok so a little background on me. I have been with my wife for 13 years, married for 11. We have been separated now for the last 3 and a half months. I'm trying to find myself again as I'd lost who I was in that marriage, I gave and I gave and got nothing back. I think I checked out of the marriage first because I was running on empty, I was the one who kept the affection going, I was the one who initiated physical intimacy but kept getting rejected. I just gave up and felt so empty inside but couldn't workout why until three months into the breakup. It's actually a very scary place, it's all subconscious and no matter how much you love someone, if they aren't giving back to you, there's nothing you can do. It hurts like absolute hell. We had such a strong connection for the first 5 years, we were each others drug, it felt like nothing else. I worry that I won't find love like that again. I'm 36 and feel completely lost without her. Can anyone tell me how I find myself again? I think back to how I used to be before I met my wife and I can't really remember what made me happy. I've completely lost my way in life. I used to be able to talk to her for hours but that dwindled away and I feel like I've become incredibly boring, no future partner is going to want that. I don't really have any hobbies or anything that really interests me. Anyone else experienced this after a breakup? I think she was such a massive part of my life, she validated things, she reassured me. I feel like I can't go through life without her. And don't get me started on all the memories, I remember our first 5 dates like they were yesterday 😔