Why is my male coworker suddenly messaging and working with me daily?

[Anonymous]

A male coworker, who I have romantic vibes with for 6+ months, has been messaging me everyday for the last one month, creating reasons to work with me everyday. Before that we worked for 1-2 weeks in a month. We are on the same team though and attended all team meetings so we did sort of meet everyday. During the last month, he has been finding reasons to get on video calls to work together and has become visibly flirty. I like him back so I do not mind the recent turn of events. He is a senior and skilled at his work so its nice working with him. About 2 weeks ago, we ended up indirectly expressing our romantic interest in each other, being mindful of the workplace. We work remotely. I got to know this last Friday that he is changing teams so he will be moving to a different department from next week. I used this opportunity to give him my personal number since I could tell we both were being very restrictive in our communication since it was on company platform earlier. I also told him that we could not find time to discuss about some work topic that he had offered to teach me 2-3 months ago. He immediately shared his phone number and asked me to book time next week as he will be transitioning to the new department and will still be available.
I would like to understand why he accelerated things in last month. He definitely knew when he started reaching out to me that he was going to leave the team but I got to know last Friday in formal announcement. Also, it is a bit strange because we both know we like each other but neither has said it directly. What does his daily reaching out mean? and how to act with him? We have been mostly talking about work and shared light humour and banter here and there.

[WhitneySnow]

He really likes you but he’s not positive you like him back

[Asker]

Thank you, actually I did make my interest clear to him last week through several mutually understood ways, although these were non-verbal because it was company chat so had to be careful. However, I am confident he understood my reciprocation of interest because I echoed his words back to him that he had said with the romantic undertone to me. Also, he will stay within the company so I had no reason to share personal number as company chat will still be there but I did share personal number because I knew we both needed to get off the company platform. I think he got that hint too. I also told him I enjoyed getting to know him and I'll miss him. Should I be expressing more so he knows for sure? If you could advise, I'll be grateful. Thanks.

[WhitneySnow]

Be as direct as you can without getting in trouble with your bosses. Guys appreciate directness.

@Still-alive what do you think?

[Still-alive]

i see mutual interest there yeah. somebody needs to ask somebody out here lol. if he hasn't done it yet i suggest you go for it yourself anon. that for sure would seal the deal of you liking each other and willing to escalate at least to the talking going on dates phase. so yeah the next move here is someone asking someone out.