AITA for being jealous about my friend bringing someone else to the movie I thought we were going to watch together

So
First of all sorry if my English is bad it’s not my first language
For second I’m AuDhd so idk if my tism make me more confused about this than I should

Now we can start
Im a 25 y/old, trans masc
And the friend in question is also 25 told, cis woman (gonna « call her » Melody )

All started a year ago, I met Melody for the first time over the realization that we both love to draw on black board at the corp we work for

At first we only talked once or twice per week but in the last 6month we became extremely close like every time we have the chance we chill together even out of work
She’s great and has a twin sister (let’s call her Anna) that I appreciate a lot too

I go to therapy each week
and share tips with them
that also help them apparently since they both come to me for advice on some personal things

So I think at that point we should be pretty close enough to tell each other the truth…

The 3 of us always watch new coming movie we thinks looks fun since we got closer
Tho
Other than Anna I never met her firends (I barely know about them too )

Which I used to not rly mind
but since two days … it start so make me think …

For context
Fnaf (five night at Freddy’s) games, movies and books are one of my favourite subjects
Like I know the lore by HEART

She knows I’m a huge fan

We talked about the first movie in our first conversation together
So she invited me to watch the next movie together when it comes out since I rly enjoy it

Two days ago Melody decided to plan on watching fnaf 2 with a friend

At first I was a bit sad
Then I became jealous

She told me I couldn’t come cuz I didn’t knew her friend
If it was just that I could understand but …
The thing is
Anna looked at her weirdly
like that look that make me think she might not have Been telling the truth

I don’t want to ask her sister if she lied cuz I don’t feel like it would be okay for me to do

I wanna talk to Melody about it but I don’t want to sound like a jerk
« oH sOo yOu doN’t wAnNa Go SeE the movie WITH ME HU? »

I rly just want understand why she chose to go with her other friend while she knew I Rly wanted to watch that movie with her

Ngl I’m slowly becoming insecure cuz I think she’s not as real with me as she looks to be … if she doesn’t feel safe for me to be around her friend I feel like she’s not honest in our friendship

I feel bad to just think of her that way since I rly enjoy her presence in my life
shes funny and we share so much things in commun in different ways

she truly make me happy ngl

So yeah I rly wanna talk to her about it

I know she might not even remember about the convo we had when we first met (about watching the next fnaf movie)

but

Rn I don’t know if I’m jealous bcuz of the fnaf movie
or
if it bcuz I’m slowly starting to have feelings for her

I just realize that writing this so … yeah

Im scared that the idea that I might not as important as I thought I was for her …
As important she is for me

Oof🥲