I actually have that addressed specifically in one chapter - “If you can’t get out of the basement.” When I was in that situation I found that the best way to keep the peace was to be out of the house early in the morning (preferably before breakfast) and not back until the evening. Trying to get in touch with a few good family/psych experts for professional advice as well.
What I’m not sure if I should address in the book is what to do if you genuinely fall in love. The ideal model of making your own home together is gonna be a nightmare or impossible for some young people. Either it won’t be affordable or there won’t be housing in a decent neighborhood available. It’s not like you can chop down a few dozen trees from the city park and build a log cabin in a vacant lot.
Here, people of lesser means can avoid renting by buying an older single wide on a half acre lot with well and septic out in the far suburbs or country and commenting in. Won’t be a showplace, won’t impress anybody at all and might even put some people off, but they can be bought in the $20K - $40K range. Cheaper than rent, by far. But, insulation is usually very poor so heating and cooling expense could be a surprise unless it’s had additional spray foam insulation put in. Walls typically aren’t thick enough for much else.