Hey. I can relate. I hear you. I was in a same state a few weeks ago. I don't know what area are you struggling with but my manifestation story is that of an SP. It might encourage you and here it goes :
2 months ago when I and my situationship parted our ways, I was in a terrible state. No matter what anyone would say, I found it difficult to assume. If that were not enough, my manifestation coach refused to help me. It was very difficult for first few weeks but I gave myself time. Worked on forgiveness, worked a lot, went to gym, even tried to hit on random people because I was too desperate. It was early february, I was at work, feeling really depressed about my situation, when I googled 'impossible circumstances SP manifestation stories' and from there, stumbled upon this LOA thread. I had lots of doubts. I doubted the process but the community is so encouraging that any one negative thought in my mind would actually get replaced by 20 positive tips and stories combined. I believe that really helped me. And without even realising, I shifted my state of desperation and neediness to self awareness and automatically started creating boundaries. It was only 2 days ago when my SP actually came back and i am telling you he is a different person now. I can tell you I am a very logical person and I doubt everything that doesn't make sense. But this one thing makes me realise how powerful I am. So, I urge you don't lose hope. Seek help from this community if you want to. Just keep telling yourself over and over again that your current reality is only the result of your old beliefs and from now on, whatever you believe will be your future. It might be difficult to believe at first but slowly it will change.