You are still talking about your ex. That doesn't sound like you feel that you have the relationship NOW. If it takes long, you have to put more energy in without contradiciting it.

LoA is about having the feeling of the thing you want in the now. You wouldn't call your bf ex, when you are back together, right? The moment you call him ex, you still think of the relationship as of something that is in the future. But it's happening right now. You can't see it with your physical eyes, but you can feel it.

The problem is usually this: After the breakup, you are very fixated on everything that happened. You tell it everyone, you think about it over and over again. His absence is very active in your vibration. After a while, you get better, but you have still negative feelings, because he isn't there. Maybe you visualise and stuff, but you cancel out the energy with all the negative thoughts and feelings you hold the rest of the day and most likely, you still think about what happend or ask yourself why he hasn't texted yet and so on - you still observe your reality. You said, you forgot about your ex. Many people say, that you just have to let go to manifest, but in my experience that's not the case. The problem is, that you haven't build up enough energy by feeling the relationship now. You aren't in the right vibration to attract him. You have to work on that.