Suggest Treatment For Depression

Question. 35 Year old single daughter appears suffering from depression. (By her own admission and help thus far). We talked yesterday, she lives in her own home. Positive conversation. She is getting more withdrawn. Says she is not suicidal. Didn t want visitors (me) yesterday, but I went anyway. Today she won t answer phone does not want visitors.. Likes her job, but is withdrawing from family that she is always close to. Does she need alone time, or should we barge I over at her house? Her dad.