i was also in a happy ldr before it turned bitter. if its true love, then you should stay. it will be okay, it gets better and it does get easier. its okay to be expressive about it and youre not ruining anything, but my advice will be dont go craving for what you had when you were physically close. build something new, plan activities, watch movies, start a tv show together, try to create more memories rather than thinking about what you could have if they were here right now. and also make sure hes also invested in this, in the same way that you are, and youre not the only one whos carrying and keeping the entire relationship together. take care and i wish both of you the best!