I hope I'm posting in the right place- I'm new, so apologies if not.
Am keeping some details a bit vague for privacy issues but was hoping for some insight.
Basically I have a family in law I get on great with. Lucky me. Only fly in the ointment is that one particular young relative of my partner is unfriendly towards me. Their siblings are no problem and have stayed with us. Child is (undiagnosed) on autism spectrum according to parents which apparently is the explanation for why they never say goodbye to me when I leave or smile or look at me. They are a bit like this with everyone but most obviously with me as I am the newest addition to the extended family and have an accent. I've tried talking to my cousin but get little response and at one point got them a gift which I thought cracked it as they got very excited and chatty afterwards, but then the next visit it was exactly the same as before. I try not to take it personally but am feeling uncomfortable at the possible prospect of having them to stay, which has been suggested, as I don't want a whole weekend of them ignoring me and talking only to my partner. My partner gets my concerns but at the same time not and says it will be fine, but I don't know if it will be.
Any advice? Thank you!!!