Guy needing advice regarding twins

My overall problem is that I need help on making up my mind on who to pursue romantically. Now for all the details: So I moved in, with 2 girls who are twin sisters, about 3 months ago. I knew both of them. Not enough to say they were good friends but definitely more than just an acquaintance. The one I knew more closely (Sis1) I got to know pretty well and developed feelings for her. One night came around I took her out and we had quite a bit to drink and she opened up about herself. Things I did not know/ understand till that point. She has psychological issues, not crazy ones, but more so phobias of skin contact and being in public places with a lot of people. Omitting a lot of details here but basically she sees that as an obstacle for a real relationship with me or anyone. Shes the kind of girl that normally hides her emotions and I might even say shes in denial about them. She watches romantic movies, shows, and reads books with romance but ask her about how she feels about relationships and she will say its a waste of time. After that night I backed off a little and tried to keep myself in a neutral situation. Now for Sis2. Shes the complete opposite of her. To a certain point. So during the time leading up to that "night" I hardly saw sis2 or spoke to her. She would go spend her nights at her ex's place. After "the night" she invites me to hang out with her quite frequently and I got to know her pretty well. I find her just as awesome as sis1 but for different reasons. But as soon as her ex "needs" her she goes running back to him. (As of this week, she has permanently ended it, so she says) With Sis2 there is an incredible sexual tension whenever we're around each other by ourselves. We just don't act on it. Hands brushing closely. Deep stares into each others eyes for no reason. We go to the movies and gym and sit around at home and watch random shows. Sis2 knows of my feelings towards sis1 and I have been treading very very carefully not to be overly forward in pursuing sis2. I been shooting for that neutral ground with both of them while I try to make sense of my wants, desires and what I need from a relationship. So my question to you, random internet reader, is: who should I go for? The woman who runs away from her feelings yet understands me but may not fulfill my relationship needs? or the one who has relationship issues, yet I always have a good time with her. The risk here is hurting sis1 feelings (this is my opinion, i do not know if its fact, she could not have any feelings towards me for all i know) and sis2 could run back to ex at any point. To clarify, the 3 of us are in our mid 20's

It already too late. You need to walk away from both. I certainly wouldn't want a man who had a hard time choosing between me or my sister at the beginning of our relationship. You should be head over heels for one of them and only one of them. Also how do the women feel about you? Do you even know or are you just wanting to pursue one in hopes that she will want you? dating a room mate is a bad idea any way. Find other women. There are a lot of them out there.