Do you think shy girls worth the effort to go for?

How I have been told, advised, experienced... Is the best way I have come up with to go for a shy girl.
Step 1 approach them consistently and warmly
Step 2 Become their freind until they warm up about 7 months
Step 3 Break the touch barrier
Step 4 lightly flirt she will react or won't but she won't show you or tell you if she did not like it
Step 5 try asking her out and hope that she has a crush on you cause other wise you just wasted 7 months and you lost a freind.

So how far off am I? What do you think about this list? What are your thoughts or advice on shy girls?
Yes they are worth it
Na they are not really worth it
It only works if she likes you
It might work if she did not like you
Unless they let you know that they like you don't go for them
Try it asking her out might be worth the risk of losing a freind
Results
Select gender and age to cast your vote:
Updates
+1 y
The number of months was random and exaggerated.
Do you think shy girls worth the effort to go for?
Post Opinion