I don't understand why you can't let your bf have a cat of his own. You said if the cat loves him and not you, you will have 10 years of loneliness. Nope, when you are ready you will find the cat you want. Your cat and his cat Gusti will work out a way to live together. This doesn't have to be a sum zero game unless you can't share.
Mostly I think you need regular professional help right now. There is more dragging you down and making you push your bf away than Gusti. Gusti isn't mean, animals other than humans don't do mean, they react to what is given to them. You are sending hostile I-want-you-to-leave-go-away-I-hate-you emotions to him. In his mind you are actually threatening his life, so he isn't going to cuddle with you. You are sending the same message to your BF.
Get in therapy right now, with a psychologist or better a psychiatrist. Your medication needs adjusting to cover your cat's death, your grief, and, I strongly suspect, your fear of getting married.
Several members of this site have psychology backgrounds. No one is blowing smoke at you, except you.
Mostly I think you need regular professional help right now. There is more dragging you down and making you push your bf away than Gusti. Gusti isn't mean, animals other than humans don't do mean, they react to what is given to them. You are sending hostile I-want-you-to-leave-go-away-I-hate-you emotions to him. In his mind you are actually threatening his life, so he isn't going to cuddle with you. You are sending the same message to your BF.
Get in therapy right now, with a psychologist or better a psychiatrist. Your medication needs adjusting to cover your cat's death, your grief, and, I strongly suspect, your fear of getting married.
Several members of this site have psychology backgrounds. No one is blowing smoke at you, except you.