I think Launch is the least in love because the other girls can overlook their boyfriends/husbands' defects, on the contrary Launch broke her relationship with Ten.

Remember to pick also the girl who is the most in love here^^
link

All of them love their husbands
Can u do which husband is least in love with their wives

Why do u talk about the husbands defects and not the wives
Chi Chi screams all the time and is flipping annoying
Bulma is ugly and screams also, she is also weak dbs doesn't make sense just because u r loud and feisty doesn't mean ur strong
Valese is bimbo and too naive but she is sweet :)
18 is too cold honestly vegeta is more loving then her
Videl has given up fighting and for some reason always makes piccolo babysit pan