trans | i have this friend...

hi. i'm not sure how to begin this, so i guess i'll start with an intro. i'm a girl born with girl anatomy. i have identified as everything from bi, lesbian, asexual, pansexual, to all points inbetween. well i guess that doesn't have much to do with the story. well, it kind of does i guess. my friend who has boy parts who puts them in my girl parts recently told me he's (she's) transgender. i fully support this. i'm not trying to say, "hey look at me, i'm such a great, supportive friend," but i'm having a problem comprehending how someone could NOT support him (her). Ok, so from here on out, i'll just refer to my friend as her because that's what she really is, she just has a penis. i remember coming out, and realizing that i am not "straight". to be honest though, i've never put much emphasis on gender either way, and some days i like being really girly and wearing eyeliner, and then other days i act (and dress) more masculine. ok, this isn't about me, i'm just getting side-tracked. anyway, i think the only thing that's really bothering me is how upset she is because some of her closest friends have not exactly been supportive, and she has been feeling really vulnerable. she told me that when she realized transitioning was the answer, she stopped feeling depressed and stopped feeling like something was wrong with her. which made me so happy to hear, because i never thought anything was wrong with her to begin with, and was really glad she could find that out too. so, this is a long way off, but when she starts taking estrogen, is she going to feel worse again? i worry that she doesn't have enough support. how can i be more supportive, and what are some good resources on the net i can look into? when i do searches, i mostly seem to get people who want me to buy their products, or porn. thanks so much... i really appreciate your time.