yep I got dumped like that as well. The girl involved said later that she handled it badly because she didnt want to hurt my feelings, but it was much more hurtful coming like that.
I can still remember clearly not working out why she said she wasn't coming out with me that weekend because she wasn't sure if she had a friend coming round her house, and then when I'd texted her to tell her what I'd been doing that weekend and asking what she'd been up to, I didn't understand why she didn't reply.
I didn't understand why she didn't pick up her phone when I tried to ring, or ring me back, and when I texted her asking if she wanted to meet up between lectures like we normally did, she didn't reply again.
In the end she texted back saying "sorry, been busy, got loads of work on, locked in my room", so I asked her if I could come round and see her for 15 min while she had a break, but no reply to that one either.
The only text that actually elicited a response was after about a full week when I asked outright "do you still actually want to see me?" and she texted back "well I'm just really busy and maybe we should just leave it".
She wasn't that busy though as I later found out she'd been going out most of those evenings, including some big gigs at the union!