dream of physical ejaculation, but seen nothing

I used to masturbate, but always regretted then one fine day while i was praying i promised Allah that i will never do it again, and Allahmdulillah i never did it, till i dreamt that i am getting physical pleasure and that i had an orgasm, when i woke up i went to the bathroom to check if i really have an orgasm, but i was clean, what i want to know is that in this case, does my promise with Allah break? do i have to perform Ghusul? because i remember it very well i did not touch myself at all. Please help, and please pray for me that i am strong enough to control this behaviour which upsets Allah, and please pray that in all ways i try to keep Allah happy. Jazakallah.