Am I just a rebound to him or could this be serious?

[Anonymous]

He messaged me immediately after breaking up with his girlfriend, who he even lived with for few years. I've only seen him three times so far, and once he briefly spoke to me when he was still with her. He's 25 by the way. He often looked at me and even stood behind me, which was quite noticeable. He's been my crush for a while.
He takes a long time to reply, usually 4-15 hours, but when he does, he writes lengthy and very personal stuff about his feelings and he's told me about how his girlfriend was mentally abusive. Several times he suggested that we should do something together, and now he made a plan, but not for another 3 weeks for some reason. The location is set, but no exact date.
Do you think this could be something serious, or is he just seeking comfort or does he just want to be friends? :/

[spartan55]

Why don't you hang out with him and find out? Do you have to know the answers to your questions right now?

[Asker]

But 3 weeks feels like forever. Especially if I don't know if it's really going to happen

[spartan55]

If you are interested then be patient.

[spartan55]

Why 3 weeks from now?

[Alex-Snow]

I think he wants to be way more than friends do u? Do u want to get sexually involved with him also?

[Tharithi]

Rebound. He ran to u the second he left her. That’s a huge red flag

[Staximus]

Approach with caution

[Akam93]

Probably just friends.

[In_Trance]

And this is a shitshow waiting to happen

[Asker]

Why do you think that?