Can I wish someone in Paradise who was not with me in this world?

As marriage to this man is not feasible, you should divert your heart from being attached to him by not indulging in intrusive thoughts, occupying your time with beneficial activities, and frequently engaging in dhikr (remembrance of God) and du'a (supplication). Know that Paradise contains all that the soul desires and the eyes delight in. So, increase your good deeds and ask Allah for Paradise.