our business?

me and my friend decided to start a business selling  used clothes and shoes and to be honest it was his idea at first but he was hesitate but not me since we know where to get the product and so i did a logo for the business set accounts on different apps and we get products that worth 50 usd at the beginning the business was incredibly slow but as soon as we get a legit company to deliver our products we slowly start making a profit but he wanted us to get our products separated and i agreed because i didnt want him to think that i want to steal his hard work or whatever amd slowly our business got serious i cant forget the first time i made 80 dollars i bought fruit and ice cream for my family i was proud of what i accomplish and my friend got mad and said he want to communicate with the customers insted of both of us (remember we are only two in this business)  and the orders are constantly comming everyday around the clock somtime there could be wrong with orders because there is two people in the same time so i tell him ok because what the worst could happen right?  well when the customers start asking about my products my dear friend told everysingle customer that its not that good and he represent his product then i start noticing my product not sold and when i found about this i confront him and he flipped out now i dont want to start a fight with him because that could screw us both i had social media but he had the contracts with the delivery company the funny thing is even though he was saying that my products are no good people still bought them now i got to be honest around that time i was about 17 or something so my family told be to start focusing on my studying so i just stop getting products and let him in charge two month ago or so he blow the business up he somehow got our social media band because he strats an argument in the comments over religious sensitive thing in the business account now im 18 and this business lasted about 4 years or so now i can redo all of this and start a new business or should i stay with him even though i dont see what the deference only if i am alone i wont have to deal with his problems