Allah (swt) says, from the signs of Allah that he created for you spouses from amongst yourselves, so that you could dwell with one another. So the dwelling of Adam (a.s) with Eve was the first part of it.
And then Allah put compassion and mercy and love between the spouses.
Now, this is very powerful and this is very important that The propeht (pbuh) said, No one is single in paradise
Lastly, something very beautiful, the Prophet (pbuh) said about spouses in Jannah, the messenger (pbuh), he said that their spouse is more beautiful than the last time they saw them.
And you would say to your wife that you’re even more beautiful than the last time I saw you. And she would say, subhanallah, and you’re even more handsome than the last time I saw you.
Meaning part of Jannah is that Allah (swt) makes the spouses perpetually more attractive, more beautiful, more loving, and so on and so forth.