Need advice - First Holiday with Fiancé

Hi

So my fiancé and I are going on our first official holiday together this summer. We went last year but it was to meet each others families so doesn’t count as a holiday.

I’ve been really looking forward to spending some quality time with him in a different environment where we’re not always tired and working.

Last night he said he wants to invite his sister and her husband to join us on our holiday. I don’t mind as they are great people I just felt really upset because as I said I wanted to spend that time with him. I told him this and he just said

‘It’s not going to be any different just because we’re on holiday and we spend everyday together anyway’

I told him that I was offended he said that and went to bed.

Do you think I’m being dramatic or do I make a point? Has anyone experienced something similar ?