Help please

gena

So I haven’t been to the doctors but I’m 100% sure that I have anxiety and depression. About a year and a half ago one of my teachers thought I had anxiety, I didn’t know what it was then so I kinda just said no I don’t think so but soon realised I defiantly did. Now she keeps saying how proud she is of me because she thinks I have overcome it but she is the only person I trust in my life so I don’t know how to tell her I’m not doing well and she is leaving next year as well and she is the only reason I have any motivation. I feel the need to tell her but have absolutely no clue how to.