Most Helpful Girl
I think blazers look great. If you are worried about it looking too manly on you, get one that has great tailoring. And some feminine details.
Get a flower pin or a nice feminine broach and pin that to the lapel. Take some ribbon or a pretty belt to cinch in the waist. Wear a nice blazer with a flowy summer dress, all of these are great ways to feminize a blazer. I would try some on in a store with a few different accessories and see how they look. It can depend on the styles too. Some may look more masculine than others.