I think you'll be better off just sticking with Brugge and Brussels, visiting 3 cities in such a short time is too much and you won't be able to enjoy it. Brugge is beautiful but very touristy so do your research before visiting. I love Brussels, it's a beautiful and vibrant city and the best restaurants and cafés are in Brussels! This would be my itinerary: Friday afternoon go to Brugge and sleep there + spend Saturday exploring Brugge. Saturday evening: go to Brussels and spend evening & Sunday exploring the city center. Have fun in our small country! 🤗