Dating your deceased best friends ex girlfriend!!??

Im in need of some outside advice for this 1...pls give your honest opinion thank u... k here s the real deal.. im a 29 yr old male and stuck in between dating the girl of my dreams and breaking the truest friendship i ve ever had... so the female im talking about i met about 7 years ago.i met her and her man at the same time. I fell in love instantly ..with both of them ..it turned out we were all best friends for years after.. me and her man .who turned out to be my boy hung out all the time. me and him worked together.. never fought.. best most loyal friend i have ever had..the 1 in a lifetime friendship became of us. Anyway instantly i had built too much respect to ever tell either of them how i felt about her..this girl dives me wild everything she does ..i have always secretly had a deep heavy crush on her..we have hung out for years.. long nights had deep intelligent conversations..we have always been on a good level..anyway little over a year ago her man ..my best friend ..got killed.. accidentally ..by her brother..who i used to be friends with ..my world has changed so much after this..it has been the hardest year of my life.. but i am doing well and on top of my shit now more than ever..her too..here s the deal she has a young daughter ..it waz my boys girl. he is gone now .his baby has no father figure at all .i would adopt her right now if could .with or without relationship of the mother..i also have 2 kids of my own but i would absolutely take their daughter on as my own..me and her have nt talked too much in the last year after his death..we recently reconnected for a few days on a cabin trip to catch up...well we really connected we havent stopped talking since ..were best friends and make a good team..we both want whats best for our kids and we are both sober unlike years before..this event has changed our lives and i think we both realize how precious life is..but anyway.. i feel like if i were to hook up with her that i am dogging on our amazing friendship We had.even tho i never did when he was alive.. i dont know what to think.. is this meant to be like it feels..or should i stay away and just be there for the kid.. am i a bad friend if i do..i literally dream about her as my girl ..have for years... sparks have been flying lately and i love the feeling.. but also guilty wondering if it is a bad idea ..or if it is a 1 in a lifetime opportunity..somebody help pls..thank you...

Love your friend tenderly. Provide for her as a husband and father to your friend's son-that is the best thing you can do for the both of them. Sure, everyone will not understand your decision. Love is kind, love is patient. If you do not marry the one you love, your partner may irritate the heck out of you. Hence, marry your love and enjoy your life. Being respectful to your friend includes loving his son as he would. Good For You! TinaW