What Are My Ex's Intentions

So for almost a year now I have been very confused as to what my ex's intentions were. For context- My friend who was one of my exes had mesaged me out of the blue earlier last year via Instagram after we haven't talked for about a year or two. At the time I didn't have any sort of feelings for them and we've slowly became friends after talking more throughout the next couple of months. However there have been a few signs I have noticed that made me feel like they might've secretly had feelings for me. First sign being them asking me Valentine's day last year if I was with anyone at the moment. Second sign was them suggesting that they could travel a few hours to come visit me (they never thought about that before so it surprised me). Third sign was them ofering to let me visit them & watch anime togather while eating some of their cooking (once I get a license & a car of course). Fourth sign the major one was them asking me twice in a somewhat teasing way if I were jealous of their dating profiles. I did end up confesing to them around mid-July of last year but they've rejected me with a I'm not interested in you nor is there any posibility of of me ever being interested in you. Okay I accepted that and even though I felt heartbroken by that and was not given a reason whatsoever as to why they've rejected my confesion I have slowly tried to heal the proces on my own while being there for them as y'know their friend. A few days after that however they randomly asked me a 3rd time (again in a somewhat teasing way) If I were jealous of their dating profiles WHILE also teling me how many likes/swipes they've gotten. I did end up asking them if they were trying to make me jealous (as a joke) and they've said no. Fast forward to four months after the whole rejecting my confesion but teases me a few days later situation they've told me that them and a coworker of theirs had confesed to each other. That's good and al but 1) they were showing me a screenshot of the convo between them (of their coworker accepted my friend's request for the first date). Then the day after their first date my friend almost told me tmi about it as to how their coworker had stayed over for the night even though I have told them beforehand not to go into ful detail. Then 2 months after that they tel me too much again as to how 1) their coworker had moved in with them after just 2 or so dates and 2) their coworker had a child (that is not my friend's) aka a fast relationship in my opinion. They even made me go through a three week long guesing game prior to teling me about #2 just to tel me about #2. Not dont get me wrong- my friend is a good person. They're usualy there for me and I try to be there for them the best way posible. And ik its been a long while since the majority of this stuf have happened but I never knew what their intentions were. Sure they've rejected my confesion but why did they continue after the fact