Leave them in a room together, they will continually woohoo and each time it does it will increase on the relationship bar.
Hang out with someone who has the schmoozer trait =)
Read the 'funny stories' book.
Right now nick Jonas has no relashionship with anybody
Yes, on the Sims 3 website under games; sim teasers.
cheat
No his not in a relationship
he is technicly his uncle
Love
no:( never been in one :/
Raise it, Use action replay and cheat, Have the day care raise it, use exp. share, oruse rare candy( only if you have enough, unless you are going to cheat)
If you spend alot of time with them, they will ask you on a date, then you can go on socialise, then it will be at the back, click on the character with the <3 there:)
Brush up on your spelling.