It can be true that boys that act this way, particularly if everything is quite public. There’s clearly a lot of rumours going around, and as the gossip is out there then your best option is to use this as an excuse to bring up the subject casually and in private. Ask him what he thinks about what people have been saying. Do not involve or consult with you friends this is between you two. As cringey as it sounds, this will be the only way to work out what’s really going on.