At the end of June, the Duffer brothers said his sexuality would be made clear as during S4 Part 2. It was clear as day the moment we saw the speech in the van.

My only issue is the whole crying thing. That was some 1980s filmmaking fake drama nonsense. Will gives his speech, turns away and starts crying. His brother up front can see what’s going on but Mike sitting right beside him is clueless? Come on, writers. It reminds me of all those scenes where IRL anyone would be able to hear someone 5 feet away walking up on them but in film since it’s not on camera, they assume we should assume that the character wouldn’t sense/hear someone right behind them.