Want to know Law under which IPC

We are in relationship for 4 month, actually he proposed me for marriage because we both are mature, adult and working. He took me to his family, I met his family members all know about the relationship from his side. My fault is this i didn't tell about this to my parents because my parents are orthodox, but he knows this because I resisted him to come close to me because marriage is a decision of both families also, but he convenced me with all his love and care that he will convenced my parents, I agreed because his family is involved so I thought he will never chested me. He did physical with me lot of time with my consent only , we both are in love, but after 4 month he started ignoring me, started blocked me, I tried to talk ,even I called him a lot ,text him lot ,he didn't reply, his family blocked me, his friends blocked me, they told me he is already had gf, but he never accepted. I want to know is this cheating or I should move on.