I can't manifest my SP

Well, I’ve been trying to manifest my SP for a few months now but for some reason, I just CAN'T seem to do it (unfortunately it’s my ex, we broke up in February and had been talking ever since, up until a few days ago(now we’re in no contact)). Even though I managed to manifest a few things, I can’t seem to bring my SP back and I’m really worried about it. Do you have any advice for someone whos struggling with that??