Going to a wedding this September. I found this beautiful yellow jumpsuit that I knew instantly I wanted to wear to the wedding (its a country wedding with farmers on a farm)

My bf says it shows my butt too much but I love the fit on me and how it flows. Its not too tight anywhere and I can sit and squats all the way to the floor just fine but my butt is prominent in it. The other alternative I was considering was a blue off the shoulder dress. I have a teal dress and a pink dress but I feel I can use them for other occasions such as Easter and Thanksgiving. I personally love the feel of the yellow and i can wear cute shoes with it. Which do you think is best?

The skirt underneath the lace of this teal dress is tight and kind of short on me.