AITAH?

AITAH for being mad?

So my mom passed away a little over a year ago and during this time my moms old friend has been helping my dad and younger sister feel better.

for like four months now my father has been telling me he liked her and was considering asking her out. I don't really care what he does, I have my own problems and I'm now focusing on improving myself but today he told me he wants her and her adult son to go on vacation with us.

Her son is freshly 18 and I know he's a good man but Ive never even met him before so of course I was a bit uncomfortable with the idea especially that he wants them both to stay in the same small apartment as us.

if they went there wouldn't even be enough space for them to sleep comfortably and I wouldn't be able to relax even a little bit.

We had a fight because I felt like he valued her and her son more than my own feelings, he knows I didn't have great experience with men and I'm awkward around new people.

I need space and privacy and it would be a very stressful experience for me instead of something enjoyable.

Now he won't talk to me and is going around our house yelling about nothing.

am I the ahole for being angry with him? Is my point of view valid?