How can i prevent Members of a SharePoint Group to see other members of the same group?
The user should not see other members.
You cannot. The only control SharePoint allows is for preventing non-members from seeing who is a member of a particular group.
I'm curious on your use case for needed to conceal the identities of others in the same SP group.
One alternative to consider is using Active Directory groups instead of SP groups, since SharePoint doesn't allow anyone to see the memberships of AD groups via SharePoint.