I got hacked and stolen $45K off my wallet

I’m a video editor/programmer who with another guy online started to develop an editing tool that we were planning on selling. We had already started developing the tool and I knew the guy enough to have some trust in him (nothing beyond online).

About 3 weeks ago, he sent me a version of the tool that he wanted me to test and I downloaded it on my computer which had the key to metamask wallet (I know it’s dumb I don’t need to be lectured about it I know). That’s how he managed to get it from there, keep in mind the "version" of the tool he made me download didn’t work it had an error when showing up which he said he would fix and send me another one when he does so I didn’t think any of it.

A few days passed by and he was starting to ghost me a little bit, but we were still communicating about the tool and I worked on it, until I got on my metamask wallet and saw my balance completely emptied (almost all the money I owned gone). I confronted him about it because I knew it could only be him at that point and he denied everything until he blocked me/deleted his discord account. I tried to look for every way to possibly get my money back but it’s gone and there is really nothing much I can do.

I can’t eat, I can’t sleep and I can’t go to school ever since I lost the money. I don’t know what I’m gonna do from there, I’m only 19 that’s a lot of money for me and I was supposed to go to University next year using a large chunk of that money but now all of that is gone. I’m really at a point where I want to give up on life.

-throwaway account, I’m truly ashamed of myself

EDIT: I will try to take legal actions but I really don't expect anything, as for the people saying I should have had a hardware wallet, I know. I also saw a lot of people claiming I was rich which is hilarious, I'm an immigrant from Senegal to Canada my parents are middle class workers (Accountant and Oceanographer) that struggled to give us good life opportunities so yes $45K is a lot of money. This is a part of the money I've invested being a video editor and held in ETH since 2-3 years, I'm not rich. Thank you for everyone sending me nice words of support, I needed that.

EDIT 2: I bought a Ledger wallet to stock the BTC I had on another hot wallet, I’m not making the same mistake again. I want to thank you guys again for the nice/wise words my brothers and sisters, it has helped cope a bit better with my situation although I still feel horrible about the whole thing. As for the ETH it’s gone, I don’t think I’ll ever see it again and although I still have a bit of money left, I’ll have to make it all over again but as some of you guys said I’ve done it once I can do it again and better.