This quote, "I really do miss what we almost had," expresses a feeling of longing and regret. It means that the person is missing something that was very close to happening but didn't quite come to fruition. It's like they were on the verge of having something special or meaningful, but for some reason, it didn't happen.
In simpler terms, imagine you were about to win a prize in a contest, but at the last moment, you didn't. You would say, "I really do miss what I almost had," meaning you're feeling sad about missing out on that prize.
This quote could apply to various aspects of life, such as relationships or opportunities. It's about the feeling of missing out on something that was within reach but slipped away. It's a reminder of the importance of cherishing and appreciating what we have in the present, as we might regret not doing so in the future.