I’m feeling insecure and I’m not sure how to proceed?

Anonymous
So to tell the story I’m 19 almost 20. From the time I was a teenager I was always “thick” I had about 30 pounds more weight than I should plus I was tall. I had a problem with depression from my home life and bullying and stress so I would gain and lose weight (I also worked out a lot) but was under 200 lbs Anyway when I was seventeen I ended up with a bag injury and couldn’t get out of bed for over a year. I was doing school online and on pain pills and depressed and frustrated and I ended up gaining 45 pounds in nearly 2 years. Well after a year of physical therapy I was finally cleared to exercise again. So I went off to college and was planning to eat healthy and workout to lose the weight I had gained and absolutely hated. No matter how well I ate or how much or little I ate or worked out. I gained weight. I just kept gaining and for a couple months I couldn’t figure it out. I felt ugly and gross and I felt it was my fault. Christmas I got the flu and I didn’t eat anything at all for two weeks and I couldn’t stop puking either. Instead of losing at least a pound or 2 I gained 10 pounds i finally went to the doctor I found out that my thyroid had almost shut down (that controls metabolism) And immediately I was put onto a high dose of meds to help because my levels are near shut down. I was told the pills would take months to take affect. My levels were also life threateningly low. So now I weight 290 lbs. I’ve never felt more ugly and more insecure in my life. I want a life and a relationship and happiness and I’m disgusted with myself. For context I was actually pretty before this weight.
But a couple weeks ago a guy messaged me and we have talked and he is so so sweet and he told me he thought I was beautiful he’s seen old and current photos and body pics.
He wants to meet and told me if things went well he wants a relationship.
I like him and I think he’s a nice guy and I want to have a relationship and sex.
I’m scared he’s gonna think I’m unattractive
Updates
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But I’m insecure of my body and I’m terrified he’s gonna hate my body or be disgusted by me. I’m trying to lose weight but I don’t wanna step on a scale. I don’t want him to know how I feel. But I’m so scared and I honestly and thinking about not meeting him.
Am I being stupid or am I right to think he’s gonna think I’m gross?
He is very handsome and he works out and is very sexy and I feel like a ugly blob and I don’t see why he would want me.
Should I cancel?
I’m feeling insecure and I’m not sure how to proceed?
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