Does God forgive the sins of one who was in an illegitimate relationship with a young man that included foreplay?

Whoever repents to Allah with a sincere repentance that fulfills the conditions of remorse, abandonment, and resolve not to return to sin, Allah will forgive him all his sins, for Allah the Almighty says: "Say, 'O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful.'" And in the Hadith Qudsi: "O son of Adam, were you to come to Me with sins as much as the earth, and then meet Me without associating anything with Me, I would come to you with as much forgiveness."