Lack of motivation

My goal after losing the first 15 pounds was to lose another 10 or so pounds by the end of the year. Lately I haven't felt that motivated to lose any weight; maybe it's because I don't see my trainer as much or that I'm swamped with work, school and extracurricular activities. Or this could be it:

Even though I lost the fifteen pounds, my boyfriend doesn't love me more. I thought by losing the weight he'd love me more and feel more attracted to me (that's what got me to exercise). I thought he'd want me more, but he doesn't. I feel rejected by all of this, no one wants me. I may have lost the weight, but I haven't gained an ounce of confidence.