25m unbearable regret of wasting 4 years of my life

m 25 year old male , i have just graduated with a bsc in business , and I see no hope for the future , i have immense regrets about my time at college , I wasted all of that(4 years) time stuck indoors and bieng a recluse I tried to socialise in the begining but would always shy away because of my weight , low self esteem and self hatred , I missed out on everything , relationships , friendships and countless oppurtunities , and now i hate my existence and the thought of what couldve been haunts me I dont know how to move forward , is this the end of the road , I hate myself even more now , and my mental health is probably at its lowest I dont know how to recover , i cant talk to anyone about this , they dont care quite frankly and now these thoughts of regret are consuming me to the point of suicidal ideation , Please I will take any advise im stuck. Im just tired and worn out