I know this was a pandemic-influenced situation. But in the future - please, no introducing dates to your daughter until you are sure it is going to be a serious thing - 6 months MINIMUM - and definitely no living together until you are in a relationship that is long-term committed (and have been together AT LEAST a year). Your daughter does not need to go through getting attached and then abandoned by your dates. And it takes that long, at a bare minimum, to get to know a person well enough to involve your child.