All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
We implore Allaah to comfort your heart, compensate you for your loss, illuminate and widen your husband's grave, and bless him with Paradise. We do not know specific Quranic verses that you can recite to help you overcome these feelings. You are advised to supplicate Allaah and recite the Ruqyah (Quranic healing) with the verses of the Quran, reported supplications, and Athkaar. The dreams you are seeing may be the work of the Devil. Please refer to Fatwa 20034.
There is no harm in remaining unmarried if you do not fear Fitnah (temptation) for yourself. If you fear Fitnah, then you are obliged to get married as we highlighted in Fatwa 87670. We advise you to fill your time with the remembrance of Allaah, recitation of the Quran, carrying out righteous deeds that benefit you in this worldly life and the Hereafter, and keeping the company of good and pious women.
Allaah Knows best.