Hi yuki,
dun worry about being over reliant... just take things as they come. I think that sometimes when these things happen, God sends down some guardian angels to help, in the form of friends or in other unexpected ways. For me, I became close to some of his friends whom I never was before, and naturally when the grief lessened, we lost contact too. It wasnt using people or being reliant on them but rather a case of you needing help, and other being all too glad to be of help.
I think a saying is very true, 'Some friends are here for a reason, some are here for a season, and some for here for a lifetime.' Take Care.