DAE have this missing people issue

I am like 90% sure I am autistic and my partner is def. autistic. We see each other on specific days of the week. I recently realized that on the days that I see my partner in person I have an overwhelming feeling of having missed them so much while apart and then it interferes with time together because I'm missing them at the same time and already in advance mourning their loss. I feel like this doesn't make sense. On the days we are apart I am very independent and don't have overwhelming feelings like this usually. We decided to try to text more and increase the number of times we see each other each week. Does this happen to anyone else? Any suggestions?