If she's holding back sex...

When she is holding back sex, it can means basically one of two things:

1. she has other worries outside the relationships that she needs to address
2. she's not so attracted to you anymore

In either case, pushing her is the wrong thing to do. If she isn't in the mood, whatever the reason, trying to force her will only push her away from you even more.

If you want to unlock her sexual desires, you must work on connection: don't push her to have sex, but don't pretend you don't care either. Tell her what you would like to do to her sexually without shame, but be prepared to connect with her in a different way (cuddle with a movie, give her a massage, walk holding hands, etc).

You don't want to show her that you NEED sex for validation or any other reason. And more so you don't want to FORCE her to have sex (because you need it or it's the "right" thing to do).

"Obligation is the opposite of attraction." --Vin DiCarlo

Show her that you are in control of yourself and don't force her in any way. Don't be ashamed of yours (and hers) sexual desires and talk about them freely in a non-judgemental way, but be also patient and caring. Don't be needy and continue to seduce her like the first day you saw her, being the man that she fallen in love with.

This is something that you can "fake it 'til you make it": even if you feel needy, act as you are actually confident and when she will give herself to you again you will have proved to yourself that being confident actually works. And when something works, you feel doing it more and more.

And when you two (or three :-) will enjoy again the pleasures of sex (if you remain calm, it'll be sooner than you think), make it a joyful experience. Be confident, take your pleasure from her body without embarassement: she is eager to please you. But don't forget to give her all yourself too.

Remember: it's more important what she does than what she says. Observe the situation and make your decisions based on what you see. When you feel she is ready, take the lead and guide her to the bed.