how do i fix some of my issues with severe poor self confidence somewhat quickly?

Yes, before you say, i know its a long journey (especially since i have been on it for a few years) but what i mean is mask it or make it less obvious to the people around me. I have been having a wake up call to how serious my issues with self esteem and anxiety are recently. With my therapist stopping a session in shock for a minute in shock after i said there is almost nothing i like about myself mentally or physically. I was given homework to find 20 things im confident i like about myself. It took me two weeks and i could only come up with 9 (its definitely better than zero but its still slow) and even worse its absolutely the thing keeping me from making meaningful relationships since one of my old roommates explained to me the other day how obvious my self esteem issues are that it makes people nervous and wary. I am now in a study abroad, and these thing are now coming to a head even worse. My roommates dont know how to deal with me so invite me places and let me be around but don't talk to me too much, i try to go to clubs with them and i get left behind because of my fear and end up leaving without talking to anyone. It feels lonley and it feels like that whenever i go out and meet people its only because of my roommates. It sucks as i see them completely mesh with everyone here and i just still have trouble even starting. Which is why i am here. I am not expecting my self esteem to be magically cured within a week, but i want to mask it, or be comfortable enough to persevere beyond it and actually become a part of the city im in. But again one of the issues i have which i have had since childhood is that i have a lot of trouble hiding my emotions, i have tried to fix that but it just hasnt worked. How do i start this?