Help

Hello guys I am fully recovered from hocd..so here is the motivation. Don't worry you will be cured..... But i have another obsession recently... There is a boy whom I liked... When I tried to approach him he rejected me.. Which is fine.. I am not worrying about rejection at all... But recently I am obsessed with the fact that inspite of knowing me he is ignoring me and all that thing.. But this is not me... It's my obsession..sometime when we met face to face I feel very nervous... And one more thing.. In the class I don't know why I want him to look at him like my brain is telling me to look at him but I don't want to.. I know it's very wrong becoz he rejected me and I don't want to chase the boy who doesn't even want me.. I don't want to think about him ....it doesn't matter what he thinks about me.... But my brain can't stop pointless obsession about him.. And I want to stop this obsession about him.... And I don't want to care what he thinks about me.. Becoz it doesn't matter to me at all.... Pls someone help me about this obsession..