Might be worth going to your local CAB and seeing if they can help point you in the direction of housing/lawyers etc.
In the mean time though, might be worth biting the bullet and seeing if you can stay with your boyfriend, if your house really is as bad as you say, if you feel so inclined you can always offer to pay him back for everything further down the line?
Otherwise, have you considered dropping out of uni temporarily until your personal life is more stable? On the uni note, they usually have hardship grants/people to help those in situations such as the one youve described. It could pay to speak to them to see if they can help you out, even if just financially?