Sex advice with Suzi Godson: Can sexual chemistry develop over time?

Good relationships need to provide a mix of emotional, sexual and intellectual stimulation, says Suzi Godson.

Q. I’ve got a boyfriend now after a long period on my own. We’re highly compatible, have the same sense of humour. I just wish I fancied him more.

Sex is a real effort and I am already finding excuses to avoid it. Can sexual chemistry develop over time or am I in the wrong relationship?