Lisa,
Although my experience thus far comes from a daughters standpoint, I would venture to guess that he may be concerned that he would hurt you. Talk to him...maybe expect that the beginning kisses may be like what you had when you were a young teen-hesitant and fractured...give it time and patience, practice, and remember how much love you have always shared. I, personally, think that by talking about it may bring the interest up, though he may need more time to take it in, he might be scared he may harm you. Patience from you may be the key. Fear does an incredible number on us caregivers.