My best friends just came out as Bi and I have a crush on him...

Okay, I'm 15 (16 in a few months) and recently one of my best friends; let's call him Jack for now, has just came out to me and 2 others as bisexual and he isn't out to his parent yet. Thing is I've have had a small crush on Jack for quite a while now... as in I thoroughly enjoy his personality and he's very accepting towards me as well as somewhat attractive. It seems now that he's out I've been noticing him doing some possible flirtatious things towards me (touching my elbow or arm by "accident", or kicking my foot or ankle He also occasionally looks at me in class for no reason.). I'm not sure if I'm just looking too deep into this, but I really want to start a relationship with him.. Only thing is theres this other girl we're friends with, let's call her Ashley. Well I'm aware she also likes him and we are all best friends and I don't want to hurt her all for my possible relationship with him. One other issue is that we are all connected by a web of friends so if Jack and I broke up it might be extremely awkward and I fear my other friends might leave me or might leave him to avoid any possible awkwardness. I hate this situation as this has me really stressed out especially since I have 3 honors classes worth of work to do and I honestly don't know if I deserve him... He shows so much kindness and friendliness towards me and I feel like I never give anything back... Anyways I apologize for this post being so long, but I felt as this might help recollect my thoughts in the hurricane they are right now.