Meh, I think the problem isn't on Soarin's end. Dash can be quite an immature little brat at times. There's one comic, from early on in their relationship, that comes to mind--after a night together, she swipes money from his wallet for a breakfast burger. I think it's time for her to either grow up a bit, or step aside and let him find a mature mare who can appreciate a--do pardon the pun--a stable relationship.
Oh wow, I remember that! So this has been building for a long time!