Tl;dr - went from a monogamous to an undefined relationship, I expressed a concern I had and I'm unsure of how to take the response.

Okay so first, here's the message :

I'm sorry i make you feel that way. It's like... And i don't want this to sound like shitty. But i have all these (15) shiny new toys who I'm getting to know. And I'm just really enjoying playing with them, but you're like patrick*. My ride or die. I guess i feel like... I trust you enough to not give you the attention I'm giving all these other little boys because i know we have something special.

*I'm Patrick, she's SpongeBob

Now for some background info. I've been involved with this girl for about 4 years now. We knew each other in school but stopped talking for a bit before reconnecting. We originally were looking to become fwb, but we fell in love and moved in together. We had been monogamous this whole time.

So earlier this year, she tells me that she doesn't want to live together and she isn't interested in a serious relationship with anyone. I am completely down with this.
Funnily enough, it's something we both have honestly wanted for awhile but were too afraid of how we might end things.

So, naturally, the topic of where we stand and where our relationship is at has come up, which currently resides at what can be called an "undefined partnership".
We both still love each other and are interested in each other sexually. We amicably split up and I moved.
Talking and even texting has been hit or miss as of recent, partially because she has gotten way more people reaching out to her. I am happy for her because I care about her, but I told her that I honestly felt like I was starting to come up second to them and when I did, I got the message above.

Now, I'm autistic as fuck. I have very mixed reactions with her reply because although there is this bond we hold and we still love each other, I am craving more from her. Despite her trying to reassure me, I don't really feel that reassured. How should I approach this matter?