I love her but I can't commit to her because of my work schedule. What should I do?

I love this girl, and we share physical as well as emotional intimacy with each other. However, I do not want to label our relationship. One day, she confessed that she has started loving me and wants to commit to me. I could not commit because of my schedule, and I lied that I do not feel the same way. She was hurt, but she accepted my decision. She stopped talking to me and started seeing some other guy who was always into her. I do not know what to do. I miss her terribly. I regret letting her go. What should I do now?

I love her but I can't commit to her because of my work schedule. What should I do?
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