This will be a completely experienced-related, piece of advice.
If she really feels that way, and you really are 'needy' and think its up to others to sooth that, then I cannot see this working out in the long run.
The question to ask before that decision, is if you can talk to her, and see if she can look at her past, and see if she has been the type to feel one way at the beginning of a relationship, and then evolve over time. Then see if she can apply that possibility to the situation with you.
if it is a case of her knowing herself real well, and history shows her, she is quite fine with things as is,....then you have some decisions to make.
It is not fun, or pretty to have opposite desires with such things, and I cant see it being worthwhile in the long run.