Since you've posted frownie faces and un-smilies, I'm assuming that you're not that
enthused about quitting riding.
I second the suggestion about changing barns if it's the people that are leaning you toward giving up horses. Sometimes the people around you can really mess with your head. When I first took up riding, a few people really put me up to the showing end of it, when I wasn't that into showing. It was kind of put to me that if I didn't want to glitz up and rake in ribbons there was no point to the lessons.
My instructor was awesome, though, and the words "show" and "class" were rarely spoken during the lesson, unless to answer a question. She and her daughter show at the national level with their QH's; I think it's a huge testament to her teaching skills that she doesn't push people away because they don't want to/aren't able to compete at that level.
One of the best things I ever did was get my own horse, stable him at home, and become my own driving force in what I wanted to accomplish with him and myself. I do show occasionally, but it isn't why I got into horses. That's Scoutrider Storytime for the day, I'll shut up now.
Now, I'll just be nosey: What has happened that now you think that your horse is bad? What kind of riding do you do? How long have you been riding? Maybe a change in disciplines will bring back some of that motivation.
Don't give up just yet. Maybe a change of scenery is all that you need.