Thanks for making this and I am also glad you will be doing the teen and elder ones. The one I use now is only for YA/A and it just looks weird when the T/E boys don't have all their parts when showering and stuff.

I like to pair them up as teens.  I use TJ's crystal ball to find out who might be a likely candidate. I like it because you can set it for only playables or by age groups.  You could use the crystal ball to find out who they would be attracted to while they are still teens.  Let them meet and build the relationship first and if all goes well, start the romance in college.  If I can't find someone while they are still teens, I will wait until they are in college, but I still find that crystal ball very useful.