Composite Sun square Neptune

You may feel you're walking on very soggy ground in this relationship, and indeed it can be quicksand if you do not watch your steps. Neptune in difficult aspect can bring confusion and deception, where fantasy and illusion lead to disappointment and event treachery. This is not quite as awful as it sounds, although its effects may be. It may not be intentional on the part of either of you. In this case, however, forewarned really is forearmed if you take action to be quite specific about your promises to each other and your expectations about the relationship. Go as far as writing it down or even making contracts, but don't terminate things if it doesn't turn out or you break the contracts. That's part of this aspect, but this approach allows you to focus on the sincere effort to correct the problem until you have some more experience with each other under your belts and know better what to expect. Failed expectations are your greatest enemy, particularly early in the relationship, so the more you can cut back on what you think you're going to get out of each other, the more likely you will be to actually achieve satisfaction together. It can be easy for this relationship to become a crutch for your individual lack of balance, and an unsuccessful one it would be If you give each other enough room to express individuality, things can only be better when you are together again.

Excerpt from "Composite Charts- The Astrology of Relationships" by John Townley