Just need someone to listen to me please…

A couple of months ago i met this amazing person - we became good friends. Three months ago i got broken up with by being ghosted. These last five months this friend and I, i feel like we’ve gotten pretty close and we have nicknames, inside jokes, maybe flirting?, etc which I feel like people looking from the outside might see it as what couples may do. They stated the other day they prioritise me, but lately I feel the text have been getting later, and I understand people have life’s bc I do too. I come from some abandonment issues and we’re both trying to open up slowly still. I worry that a lot of things I might say will scare them off bc a lot of things I’ve said aren’t even the worst things . All I know is that they make me feel safe, warm, comfortable. Truth is I worry about them. Their ex actually messaged the other day and gloated about how happy they were in their new relationship which they got into so quickly after this person and I felt so hurt for them. Why was their pain for me to feel? I don’t have any right. Right? I do things for them that I didn’t do for my past relationships like baking over FaceTime, taking photos of nature, trying to immerse them in my daily life. They quite enjoy it. I’m scared that I’ve gotten too close when I told myself I wouldn’t…