My bf cheated on me for a goldigger...... :'(

He always kept lying that he loves you but he never really cared about me and I could see this from the way he always treated me.I truly loved him sellflessly. Whenever I wanted to talk to him and he wasn't in the modd , he would just shut me up. He used me for helping him in making notes for exams. I've been with him for 4 months and we know each other as friends from past 6 years.His other gf with whom he cheated on me is with him for 3 months had a bf whom she dumped because he didn't have enough money like my bf. My bf spends almost all his money on that girl. Stays all dia with her and talks with her all the time. I broke up with him I just want to save him from destroying his life because I know that his gf loves his money and not him.She will leave him in times of trouble.