suggestions for a newbie

Hi all! I’ve recently dove (dived?) headfirst into the edging/denial world. I’ve been dabbling with the idea for a while, but I’ve never really gone more than a day without giving in and cumming.I really want to challenge myself, but also, I want to impress my girlfriend by going above and beyond my denial. We don’t have a total power exchange kinda relationship, she only denies me when I ask to play around for a while. Does anyone have any tips on how to go longer without cumming? Or any fun challenges / fun ways to edge?I’m a full time college student with a roommate who’s always home at the same time as me. My bathrooms and showers are communal, but I’m very okay with doing stuff in there. Usually I only get to masturbate in the shower, but with my gf’s help, I’ve been able to edge a bit in the bathroom stalls themselves. I only have a mini hitachi at my disposal in terms of toys, and I can’t really finger myself. Don’t know why, I’m just unusually tight and it’s not even frustratingly pleasurable. Just uncomfortable. Also, anal is a strict no for me. Any tips / challenges / ideas to get around the roommate thing would be very much appreciated!!! Thank you so much all!!Edit: would prefer comments only, and also for added context, I’m in a ldr relationship so unfortunately she can’t hold me down and help me out 😔 rip female orgasm denial Get your own Orgasm Control toys: For men: http://www.amzn.to/1V6XQvv For women: https://ift.tt/1UWn54n