How can I get my husband to cuddle with me without it always leading to sex?
I'm assuming that you have already expressed these feelings to your husband, because if you haven't, that is the place to start.
Explain to him (not when he is at that moment desiring sex) that you enjoy love-making, and want to share that together, but that you also enjoy being cuddled for a feeling of closeness that is not a sexual invitation.
He may be getting mixed signals. He may think that your desire to cuddle is an invitation for love-making.
Most likely he will want to meet your non-sexual touch needs. Just be sure and be clear with him so that he does not experience rejection because he did not get the message you intended. With open and sensitive communication you can both get your intimacy needs met.