I dont do research on these things .... lol
But I believe to start a stable relationship ... u need to have 2
criterias met...
They are : Understand and passion
Understand and passion are interlink... With understanding, u r
able to create passion between both... With passion, u r able to
open up one's heart then able to understand one... So, it is just a
chain reaction...
For example, if u and him or her being friends for too long, u
understand him or her more than a newcomer... But however, if there
is no passion between u and him or her, u cant expect him or her to
say "yes"... Since, u understand him or her, it will not be
difficult to give him or her surprise, sweet talk, cause emotional
stir, make her happy and blah blah...
For example, if u and him or her just started due to passion, him
or her feels for u more than normal... But however, if u dont
understand him or her, it is difficult to maintain these
feelings... Since, he or she feels for u, he or she usually opens
up his or her heart and tells u everything that he or she thinks.
And thus, u build up the understanding...
In short, if u understand him or her, u need to build up the
passion
if he or she feels for u , u need to take the chance to understand
her
Very tiring ,rite??? haha... therefore, u can only apply these
concepts naturally... If it is destiny that both of u are together,
u willl be together no matter what circumstances...