Do NOT ask him if he still has feelings for you. He doesn’t. He’s lost interest. When a guy doesn’t ask you out, or stops asking you out over time, he’s not interested in dating you. Asking him why he’s not asking you out or telling him you’re interested in him after he’s stopped dating you is just going to make him feel worse about being with you. He’ll feel guilty, annoyed or like you’re a charity case. It’s best to keep your feelings to yourself or talk to your girlfriends (and me!) about them. Not him.
While it’s fair for you to continue to flirt with him, you’d do best to move on and look elsewhere for love.