If you're going to watch this movie expecting a love story, then don't, because it is not.
This is the story of a man suffering from disillusion, a man facing his own failures, regrets and wrong choices. It's the story of a man who has to admit defeat and who regrets his choices. He has to leave the city, going back to his parents because he has to go back, not because he wants to, as going on is not an option.
The last thing left to him is going out with a bang. There is a party, there is a lot of sex. He ends up taking part in neither, and there is no bang. There isn't even a sizzle. There is just a sad weariness, and it's the main feeling of the whole film. No one even notices his absence, the scene he has loved so much and has to leave behind just spits him out like an old chewing gum and forgets about him. There is nothing bittersweet about it. It's just bleak.
This movie is not a gay love story, it's a movie with gay characters. It's full of sex, heads on and no filters, but the general depressing atmosphere of failure would be the same without the sex, and the film would hardly change if the explicit sex scenes were replaced by a fade-to-black.