Hi,
First of all im sorry to hear about your situation i know you are going through a hard time but thats life for you.
Look these are testing times im sure youv had a good life so far and im 110% sure you are going to have a better one later in life. Now is the time you cannot really see beyond the mountain of your dad’s suffering and responsibilities that have prematurey come your way but THIS TOO SHALL PASS. the difference between good times and bad times is that the good ones seem to fly in snap of seconds and the bad times literally makes time crawl.
My only suggestion to you is that first of all you have to stop feeling sorry that you are writing about what you are feeling infact im glad that you have come up with it, not everyone has the guts to come out open with it and seek help which is te first signal of the strength you possess. Time heals everything buddy but TIME ALSO TAKES TIME. Be headstrong face the challenges that are coming your way-

1.Be there with your mom hanle the business it might seem undoable right now but eventually in some time youl find your way through and there aree possibilities that your engagement in the business may help you to take you away from such thoughts so tht brings two benefits : you feel less of what you are feeling right now coz you are busy learning the business and you make your parent proud already at the age of 20 IMAGINE your dad knows that his son is capable enough to look after the family and your mom needs to put less effort in it if you learn it and take care of other things. Trust me on this one once you are on the job time passes like anything.

2. Talk it out to yoour college authorities for an arrangement where you donnot have to drop college and that you can ateast appear for exams. Your situation is a considerable one it might just work out for you provided you give it a shot and talk it out to someone in authority. Im sure they will understand afterall humans are creation of god and someone will surely undestand. Imagine what if it works out then yu dont have to drop you college and still bget to complete your studies.

3.As far as having fun with friends and having a gf is concerned its a very natural the way you are feeling about them. But first you have to understand they are not priority at this point of time. It may sound Harsh but at this point of time your family needs you more than you need your friends, and this is the time when you realize who the real ones are and who you need in life. All this is not priority right now but ONLY NOW. ONce things settle a little you can definately fall in love and have fun with friends and even now take out sometime ang go out to unwind its much needed. but you donnot have to get carried away.

4 Lastly TRUST GOD he wont give you more than you and your family can take. He has just put you on a trial prove him that you are a good son and you will be rewarded in abundance. Serve your parents like GOD and GOD will serve you like his own special child.

Stop stressing so much breath out take a fresh start get down to the business, talk to your authorities, take care of you mom and dad, Do all things that your dad will be happy about it surely will bring some healing in his life too. REST GOD IS RIGHT BESIDE YOU GIVING STRENGTH AND LOVE.TRUST HIM AND YOU WILL BE FINE IN NO TIME.

LOADS OF BLESSINGS AND STRENGHT TO YOU. TAKE CARE.