When Max goes to Lorelai’s house, she tells him that she has always kept her dating life completely separate from her life with Rory, and that although she has dated men, and had a sex life, none of the men have ever been to her house.
From this we know that Lorelai has tried to put Rory’s needs before her own, and that she has to some extent used Rory as an excuse to keep men at a distance and avoid commitment.
The logistics of how she kept the men completely away from her house are something of a puzzle – I’m guessing she never dated men who lived in Stars Hollow, the relationships never progressed very far, and that she must have had reliable babysitters who could care for Rory while she was out on a date (Babette, Sookie, and Miss Patty seem like good candidates).