re-occuring dream of ex boyfriend

Hi I am new to this but here it goes

I have had this dream about 4 times in the last year I meet an ex boyfriend from about 13 years ago, he comes on to me and we always end up having steamy sex which is always initiated by him. Last night I dreamt of him again this time it was me that made the first move, also instead of it being steamy it started with long slow kisses,it was loving/intimate.

this has really thrown me and i dont know what has brought it on. please help me make sense of it.