How old is she sweet c?
Sometimes the resistance is very strong, and it's simply that they're not ready. It comes and goes in cycles, too, and there are often peaks where kids are typically more demanding of parental attention. If they're breastfeeding, then this is the way it is expressed. If they're not, they demand other things - ups, cuddles, etc, etc. Roughly speaking, around about 14-20 months seems to be a common age for this.
If she's eating well otherwise, it's probably less to do with nutrition and more to do with comfort and security. In a word, it's you that she needs. Many mums in this position find that if they can set some boundaries and reclaim some time to themselves, they're better able to ride out these high-demand periods. Once her needs abate a bit - and the best way to see them go is to meet them - then you may find the weaning process is a lot easier on the both of you.
All the best - it is really hard to find that balance.