NEED SERIOUS ADVICE! should i let go or stick to it!?

HOPEFULLY i can get a little help n i can clear my mind. this is the story of my life..here is whats going on. i was introduced to steve by my bff laura. they used to mess years before i met him, in fact they were pretty good friends when i met him. ok, she introduces me to him..we start talkin like friends..just straight friendship, cuz he had and still has a girlfriend. one day laura told me "supposedly joking" that i should mess with him. well..i kinna followed what she told me..n after a couple of coversations or w.e. we realized we have a lot in commun so we just couldnt stop talkin..5 hours will p by on the phone like nothing. laughin off n telling storiez of how his relationship aint going well n its going down the drain..blah blah blah!!. bottomline we started talkin as more than friends..i lost my virginity with him and all that. did i mention laura did not know about all of this after months later..she knew i was talking to someone but she didnt know it was her good friend steve. after all the drama between the three of us wheni told her about what was going on..come to an end when laura and steve dont talk..she cant stand him..shes my bff but dont talk to her about this kid at all..oh well!!!. aight!.. this kid has been with his gf for about 2 years, we been on and off (including ) for about the same time. did i mention hes the only person ive ever had with. at the moment we are what we called "really good friends". i give him advice with his girl and all that. i honestly have no idea why i still do it, why he still around!.. i love this kid after all he was my first, and i kno it aint love like to say i am in love..its just that some ladies get attached to the first guy we get physical with. and i think that is what happened to me. but its been over 2 years of messin with him..the reason y he around is because i always told myself i will have a good friendship with the person who popped my cheery!.. its being an emotional rollercouster for me..n for steve as well (somehow). i feel like i still have feelings for this kid, but i have noticed it is going away slowly...really just way too slowly...now this is where i need advice...Should i let go of "my good friend" or should i stick around till the feelin goes away.