I'm in a similar situation as you... I'm a newbie to manifestations.... but I'm currently using the technique to attract my ex who left me for another woman. I think a crush very different (and much easier) to attract than an ex because with a crush, you really only have positive feelings about him. A crush is usually only a fantasy... someone who has only brought you happiness. Someone you love brings much more intense feelings.. the happiness is much stronger than a crush, but they can also bring you great pain. I find it very difficult to push out all the thoughts of pain and anxiety. Maybe you're letting those feelings pop in. I know how incredibly difficult it is to block it out. I constantly struggle with it too. Just stick it out and remember how worth it he is!
Don't lose courage! It took some people a year to be with their POI and if it's working on him then I suggest to keep trying as you will get him. There may be progress happening behind the scenes that you haven't seen yet but eventually he will come to you.
I have had amazing succes with techniques on crush but when it comes to my original POI I get only synchronicities and 2222 numbers everywhere related to him. He is still with girlfriend. I know he gets messages and has feelings ( he blocked me after doing RS) but I got impatient with breaking his walls as it is going on for 8 months so far.
Will I get him in the end or to give up?