Lollerskates! Speeches? With my stage fright? Not a chance! But thank you. Perhaps. But it's not like the characters in MLP are without interest in love. Rarity was smitten with Blueblood (for a while), we have Mr. & Mrs. Cake, Equestria's ONLY married couple to date, and of course, the big secret: So there's no reason Dash couldn't fall in love, or at least get a small crush on somepony. That said, Dash is probably least likely to get such a development because of the fans who would go ape**** when their beloved Dash isn't what they thought she was. And imagine the sheer smugness from the fans if it turns out she really is a lesbian. It would be tangible.