The relationship the two of you have is an experience that has resulted from two rather different personalities trying to create an intimate bond in the only way they know how. That means that each of you has your own ideals in life -- what's important to you, what your needs are in a romantic relationship, what a relationship should entail and so forth. In this case, those ideals may not coincide perfectly, and you can both feel slightly frustrated by that conflict.
The better you've gotten to know one another, the more those issues have likely increased, but instead of talking things out and striving to understand the differences that exist between you, you're both more likely to just let the issue drop in a temporary truce. However, there is a bond between you that you both want to preserve. The benefits of your union far outweigh the difficulties, and confronting your differences isn't something either of you want to do. Instead, your lover, especially, tends to take an unrealistically optimistic stance -- we don't have to worry, they tell themselves; everything will work itself out in the end! And it often does, for essentially you both feel generous and tolerant of each other. Facing the issues you share and communicating about them openly and honestly will help overcome any problems with excessive behavior that you two may encounter.