Hi sparklekitty and welcome to psych central
It sure sounds like you have a lot on your plate and the guilt is eating you up. Would you be able to walk away from your family if you chose your boyfriend? you have a difficult choice to make. it doesnt sound like your boyfriend would mind helping support you thru uni and that option would take so much pressure off of you, if you are willing to live with how your mother would feel about you. But it is your feelings that matter and you seem most happy and get the most support from boyfriend and his family so you really wouldnt be losing much but heartache.