First they should never attempt to make a man into something hes not. Dont date a guy because "well its a good starting point, i just need to fix him up a bit"
Then another important issue is, dont have lots of sex at the start of the relationship, then have almost no sex later and wonder why hes left or is cheating.
I have heard a comparison that having a relationship with your boyfriend is like flying a kite, you always keep the string in your hand, sometime let them fly higher and further sometime pull them back closer. ;) I hope it helps.
They don't let them have any space---ask a million questions when they go out with their guy friends---nag about every little thing---smother them---act jealous of every woman he talks to--snoops though his stuff---tries to act like his mother---. 2. Make him feel good about himself. Make him laugh. Be his friend.