Pray for me, and I will pray for you.
I certainly know what you mean.
It’s odd, but the subconscious mind can’t understand negative commands. That’s an insight out of hypotist psychology - since those guys are fairly successful at what they do, I think it’s a credible insight. Thus, we shouldn’t repeat to ourselves, “I can’t be in love with this person,” but rather, we’d say, “I will love this person as I ought,” or “I will think of something else in preference to romantic feelings.” Positive diversions work better than outright denial, then. After all, you can’t negate someone’s else existence or feelings, even. I think feelings require re-shaping, rather than suppression. Take what I say with a grain of salt, however - I am not a doctor or a psychologist or an expect of human nature. I just borrowed insight from a website and tried to give it a useful application.
Being in love with someone you shouldn’t is painful. Moving past it is not easy.