Women that are being abuse by men

My best friend (amanda)i love&care about her so much she has been in many relationship that she has been in its really shame thats the choice she makes every relationship (amanda)is with a guy now that does one drug that take him to a different level he wants to have three or four somes every time he does that drug he cheats on her texts and does another things to her in her face she loves him i wish she never meet(jason).