How do I get my act together - lose weight, gain confidence and get a girlfriend at 33?

I am 6'2 and weigh 350lbs. I am big built but defo fat now. I am a very sensitive person and was bullied and beaten up quite badly for being fat between the ages of 5 and 14. I have never had a proper girlfriend but had my heart broken quite badly a few times. At 21 I had my first (of very few) sexual experience with a beautiful girl who was a great friend of mine - she said we were soulmates but then rejected me - that was the worst and destroyed me. I feel lonely alot. I just know that no girl I like would ever feel any desire for me and I am going bald and feel if I lost 100lb I would still look awful. Plus I just never try anymore - The last time I tried was at about 28. I feel down but do not want to be alone forever. I want cuddles and hugs and sex with a hot woman. I feel awful for using adult material and need some motivation. Besides all women over 25 are in relationships!