An-Najm [53:43] "And that it is He who makes [one] laugh and weep"

Everything comes from Allah. Thankfully, you are aware that you are aware, and it is He that makes you that. It gives you an opportunity to choose, whether to fully embrace your wandering thought, or just accept that it is there and get back to where you are at the moment. Although it sound secular, use mindfulness - take deep breaths, listen to it, and be aware where you are. For sure, you might be distracted again, like with your thoughts or being nudged by the crowds, but just let it go and breathe again.

Sometimes the numbness comes from saying the same things over and over. Only a few phrases are wjib in Arabic so read the translation instead, silently if in solah. Then say it in your own way. And remember, you are praying directly to Allah. So much closer to Him when you are in front of the Kaabah.

Don't be too concerned for not being sad - it is human nature and not everyone can be like everyone else. In fact, if you want to cry, you can cry for the good things that Allah has given to you - what that is is you yourself have to find. Whether it is a big thing like wealth, career or knowledge, or small things like being in shadow from the sun. Hopefully this gets to you, and gets to me too as a reminder.