My partner and I were long distance for this year. At first, it wasn't hard because we were used to it from previous times, even after living together for the last 4 years. When COVID hit, it did get harder, as it interrupted our plans for seeing each other and not only did I have the added existential weight of the pandemic and managing internship and my cases, but I didn't have a partner to help me with household things. It was definitely hard, and with five days left I am grateful that it's almost over. However, I will say that I have been SO busy with internship, sometimes it's nice to come home to nice and quiet and be alone.
My general advice: set expectations and a schedule for how you communicate (e.g., I would let my partner know when I had a busy schedule and that way he knew not to expect a lot of communication from me), use your interpersonal effectiveness skills to let your partner know if something isn't working, and be validating of their concerns if they happen.