Thanks for the detailed reply. A lot of what you're saying I agree with, it's just that you seem to be taking a very absolute stance and I just don't agree with that. But it's interesting to discuss.

I do believe I need to become better at mindfulness, it's always been difficult for me compared to other things. I sometimes get very lost in my thoughts, but this makes me feel sharp and alive as well. I just wanted to mention that in my example of thinking about seeing my girl tomorrow... the thought was not coming from a place of lacking. I'm very glad I was by myself today, and I don't feel I need her company to be happy or anything. I wasn't feeling the lack of her company. The thought just popped in my head and I got excited that tomorrow I will get to spend time with her. It actually added to my happiness and positivity in the moment because then not only was I fully satisfied with my current moment, I remembered I was going to have a good thing happen tomorrow, which increased my feeling of joy about life.
Another thing is the whole concept of ego itself... I notice a lot of psychedelic users who get into the spirituality of the experience, as well as other spiritual-minded people, seem to have this idea that the ego needs to be suppressed. In my opinion, the ego is what makes us human. Yes, we are spiritual beings that exist beyond this current human life, but we're here as humans for a reason. I believe that reason is so that we CAN experience what it is to have an ego, to have the illusion of separation from everything else, to have thoughts and opinions and emotions and ups and down, so we can learn as a being. To be human, ego is a necessity - I'd even go so far as to say that it's the very thing that MOST makes us human. It's our individual personality, the thing that makes us unique.
That said, it's also important to understand the ego and to be mindful above its impulses. To focus too much on the ego is a bad thing that causes suffering in both yourself and others, to be sure. But I would never want to suppress my ego totally or even mostly, only the negative or destructive thoughts that sometimes can happen. Instead what I do is work on identifying what brings me or others harm in my thoughts/personality (ego), and become aware of those and let them wash over me without affecting me. This leaves only the positive and loving parts of my ego behind which are the parts I always want to feel and think. Those are what make me
me. It doesn't make any sense to me to try to "overcome" the ego completely. If we were supposed to do that, then why were we born as humans? It reminds me of the Catholic church, how they try to tell you that your inherent nature is evil and that does not please god. But why would god make us with such a nature then?
Being a human has its ups and downs and is very challenging at times, but the other side of that con makes it far more than worth it. The experience of being a human can also be beautiful and exhilarating and fulfilling. It seems to me that the attempt to eliminate thought and only be aware of the exact present moment is almost taking a step towards transcending humanity itself. And I just think it's sad for someone to not embrace being a human, while they're a human.
For the record I'm not 100% sure that you're saying you want to overcome the ego entirely, but it seemed likely, and even if not, this message applies to a good number of posters I can think of.