My fiancé thinks I’m depressed

So I work between 40-60 hours a week . My fiancé and I are in the middle of trying to find a place to move but I’m the only one working rn and it’s been very stressful on me to pay the bills and then save the rest of the money for a apartment. My parents have given us until May 17th to move . I can’t spend any of my hard earned money to treat myself ... the living situation is very stressful . I’m tired of the way my sister treats me . She is always calling me dirty names calling me fat and loads of other names . I get very upset and either hold it all in until I burst or until I cry . It makes my fiancé sad 😞 he thinks I’m very very depressed. He told me not to deny it because he knows I am . I don’t think I am and I’m not sire what to do . I’m losing my mind !!