Can Stoicism be seen as something close to Buddhism in some aspects?
Stoicism can be seen as very similar to Buddhism in that it appeals to an ultimately indefinable reality which, through the denial of ego, awareness of which brings harmony to life.  Also, the stoic acceptance of whatever happens being in accord with nature is like non-attachment.  A Buddhist writer I read recently said that they are in many ways the same other than the Buddhist has greater joy to the extent to which their ego has dissolved.

Stoics permit suicide in a wider range of cases than Buddhists, although the principle that suicide is an option when spiritual practice is no longer possible is the same.