I think of a player as what we used to call a cad: a guy who lies to women and misrepresents himself to them in order to get sex. Once he gets sex he drops them.
There's a longer term variant of this, tho. What I call a serial monogamist. This is a guy who jumps from one relationship to the next in order to have a steady source of sex. These guys will bail once a commitment (marriage, children) is being pushed for by the woman. These guys have GFs for 1-2 years, or keep them at distance w/LTRs.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh