We can't tell you what it means. Though if she's seeing you soon as "friends" then I'd say you have to take that at face value. It's certainly not any type of date!
The thing you need to do is get some boundaries of your own up and happening. Work out what would be acceptable to you and stick to your guns. For example, would you be ok being her "go to" guy when she's all sad about each future failed romance with a new guy?
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.