Living with someone you've dated

Right, may have done something really stupid here... Basically, I met a guy in january through a university society we're both part of, we got on well straight away (as friends!) and agreed to live together next year (my 3rd year, his masters degree) with a couple of other friends who we're both close to. However, in March after a night out I ended up at his, and we ended up kissing and I spent the night at his. From then on we dated for just over a month, and gradually got closer to being in a relationship - and I fear I've fallen for him, which was ok up until last week, then he broke things off. I agree with some of the reasons he broke things off - we're living together next year and if we ended up in a relationship and then things went wrong that would be really awkward and horrible. He said that not knowing how I felt, so I'm assuming he feels the same way, he was acting like he did up until that point. So I know we can't be together now, but now I have all these left over feelings for him, and I can't do anything about it. I don't think he realises how in too deep i am, and so far i've been pretty good at hiding it. But right now I'm finding it quite hard to see him, he acts like nothing happened, and though I'm fine when I'm with him, the rest of the time I just feel really upset all the time. I'm pretty sure I'll be fine by the time we move into the house in august, but as this situation is COMPLETELY new to me, I was wondering if anyone has been in a similar situation before and has any advice/warnings to offer? I feel like it could all work out but I could be completely wrong :( Any help appreciated :)

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