I'm not a very outgoing or talkative person, but have been suprised how many people will strike up conversations or show an interest when you're touring (so you don't need to be). If you meet any it's also very easy to get chatting to other cyclists, people in hostels, etc. You get to talk to people, it's not boring! It's not boring even if you don't! Also, as Vernon mentioned, acts of hospitality seem to come out of nowhere - one I remember the most stopped farmer for directions in Croatia, next thing his sons were being commandered to fill up water bottles, I was invited in first for coffee, then the soup was put on the boil, then some meat, more coffee, icecream, beer, 2hr later can hardly get on the bike. Then ofc you're your own boss with schedule, what to do, how fast, how many miles and all the rest. With friends you're not and living out of each others back pockets within a couple of days you can start to irritate each other with silly things (3-5 day honeymoon period imo then it starts). Main thing I dislike about solo touring is you're having all these experiences and whatnot and no one to talk/share/compare notes with (without offloading them when you get back and boring people silly).