I don't mean right after casting being tired, but what about 2 weeks after, while the spell is in process, Is being tired normal? What about intense crying over a person that you used for a spell, does that mean it backfired? I know there's the rule of not choosing a specific person, but at the same time I really missed how things used to be between us and I was desperate, I couldn't help myself
You are not concentrating in what you are doing. Maybe there are other emotional trauma that you are facing.
Take every distraction away and channel your meditation towards your spell casting with full authority and I believe there will be a change with a positive effect.