This is a great FFO (first finished object)! Lovely stitches and beautiful colors. A great gift for your BF. She probably won't want to use it as a dishcloth. Nicely done.
A coaster will be a perfect companion.
is misleading. Look at what you've accomplished: casting on, mastering tension and holding your working yarn, binding off, and weaving in loose ends. You're off to a great start.