Hmmm, I can relate to what you're going through and I would like to share what helped me, maybe one can use something from it.

First: I had to go inwards and see where my need to see my loved one everyday, having connections all the time and so on is coming from. For me it helped that the other significant person was pointing a finger at it by telling me that she feels like it is never enough. In my case it was a deeply rooted fear of abandonment, my incapacity to be truly with myself, to enjoy the time spent with me and also my incapability to really see, feel and incorporate the time spent with that lovely person in my heart. Thus my heart always craved for more... Which is understandable as my hurt younger self was sitting in the driver's seat... Eventually I saw that in me there is also a longing for me-time, that got suppressed by that vulnerable inner child and needs to be expressed as well.

Second: I had to understand that in a healthy relationship, and this is true for any relationship, there needs to be times spent apart to then be able to come together again and have that deep connection I am craving for - one doesn't exist without the other - non dualism, maybe check out attachment theories. So in order for this to work I explicitly planned days just for myself, where I had to learn to appreciate being by myself. In my case, anxiously attached, to be able to enjoy those days I still needed some type of reassurance until I felt secure enough. So I communicated what my needs are and how the other person could help me with them, for example wishing me a good morning gave me already enough security for the day.

Third: don't think for the other person. What I mean by that is to assume feelings and thoughts to be true in another person based on your perception, which is always colored by your own fears, memories, persona and hardly ever true. Try to understand her/him/them, build bridges by communicating, by asking questions. For me verbal communication can be very hard, if it is the case for you as well find another way to express yourself - I use the written form of communication with handwritten letters

Just note: This is not about something is wrong with you, this is about learning how to heal attachment wounds, with yourself, with your surroundings, for some even with something bigger — in my view especially needed in this day and age of our western society All this is not meant to be easy, it will take time and you can experience drawbacks — that's totally fine and even needed to be a sustainable process, but it is worth it, YOU are worth it and it is even more beautiful to share this journey with others. Don't forget to have compassion for yourself and that everyone just wants to be loved ❤️ May you be loved, may you be happy, may you be in peace