I sometimes feel the same way too but I think it's because I am going through a really hard time right now and thinking about my ex and visualizing is making me sad

When I started trying to manifest my ex back I was the same. I'm about 3 weeks in. It gets easier. Trust me. Just keep focusing on you. Think about the feeling you would get if your ex came busting through your door and begged for you back. That would feel pretty awesome right? Now remember that feeling. You need to feel that way just being with yourself. Feel the unconditional love for yourself and everything will fall into place. Remember it's only hard if you think it is. Just relax and say to yourself this is easy and most importantly feel good.