Lilith in the seventh house
This is a house of marriage and partnerships, public house. Lilith is associated with deep and hidden parts of the psyche. This symbolizes the great possessiveness in relation to the partner or close friends. Attracting is huge, but it can also symbolize the rejection depending on other aspects. They are always two extremes, there is no middle way. Partner relationships can also have therapeutic powers or extremely destructive. Psychological trauma after the end of connections may be associated with permanent damage to the psyche. Destructive emotions roads. Jealousy is emphasized.
Lilith is striving for absolute, positioned here speaks of the huge expectations of the partners themselves, relationship or marriage in general. With this comes the frequent disappointments because "absolutely" does not exist. And this Lilith has a huge problem to accept that. There are two possibilities: often breakup in relations/marriages or destructive battle within a relationship or marriage that may not last very long.
Also, in a more positive setting Lilith here can attract people who are very independent, with her expression of eros, rebellious character, tremendous passion, those who are craving for total perfection too.
And as I pointed out, depending on other planet position and other aspects in the natal chart, Lilith positioned here can be a positive stimulant in strong relationships but also can symbolize a very painful experience in the same.