I can’t shake this feeling of dread

So just a little backstory, when I was in middle school I was very depressed and suicidal but I got better and now I’m a senior in high school. Now I definitely get depressed every once in a while (mostly when I’m alone and I start thinking too much) but it just comes and goes. But the past like two weeks it’s gotten really bad and I just don’t know what to do. I feel so sad and anxious all the time. I can’t sleep and I’ve gotten into a really bad habit of skipping meals and it’s gotten to the point where I hardly eat anything a day if I even eat. My boyfriend started noticing that I looked unwell and that I haven’t been eating and now he’s worried about me and that just makes me feel guilty. :( I don’t know what to do anymore.