In this dilema ,I have been with this girl for 5 years ,,,
honestly the love has faded and only left with responsibility
towards her,,,, friend and family have been pressuring me to
marry her , i keep asking myself am I the one for her or should I
just break off this relationship so she can find someone better and
not hold her back ,,, if you are in this stage you know what
i mean because we have been together for so long there are bound to
be emotional attachment ,,, is not so easy to call off the
relationship
Friends been telling me only marry the girl you love and find
compatible and someone whom you want to spend their life with ,,,
easier said than done,,,, because you cannot find someone like that
,,,, even if you found her she may not accept you in the first
place,, anyone in this situation before ..can enlighten
me ??
You already find no
reasons to be in the relationship and hence, the last thing you
ought to do is to put yourself in denial mode.
If obligation is the only reason why you are in it, but before
you decide that all is over, you might want to speak to her and
trash everything. You might or might not learn that this
relationship is truly over and if the outcome is not promising, as
least you can work towards an amicable break-up, which is pretty
much a mature way of handing issues, rather than opting to run
away.
P.S: Relationship is never static - length of relationship does
not guarantee everlasting fulfillment or marriage. 
Cheers