My girlfriend told me she prefers big penises. Now I’m worried I won’t satisfy her

She has apologised for mentioning a much larger ex – but the comment still haunts me. Should I walk away?

I have been seeing a woman whom I met online for almost a year. Before we met face to face, we had a number of phone calls, during which she became very sexual very quickly. She asked me the size of my penis (which is slightly above average). Then she told me she liked big penises and that an ex-partner’s was 12in (30cm) long. This made me feel very insecure and I told her this. She said: “It’s only a preference.”

Since then, this issue has surfaced again and again. I know it’s hard to believe, but we haven’t had penetrative sex yet. (Initially, I wanted to take things slow. Plus, she is menopausal and hasn’t been feeling sexual much of the time.) We do have other kinds of sex and she says I am the “best” in this respect. But penetrative sex, for me, is very important. She says I’m “big enough” and that she is sure I’ll satisfy her – but the thought that she “prefers bigger” is devastating. She says she doesn’t understand why she made the original remark. She is sorry, but this doesn’t help. I feel I should walk away, but I have strong feelings for her.