ANSWER:
It is not permissible for you to communicate with him in the first place as pre-marital relationships are prohibited in Islam. If he was really practicing, he would have approached your father for your hand in marriage rather than talk to you.
Marrying him is not recommended. They say: you fool me once, shame on you. You fool me twice, shame on me! He is a compulsive liar and can’t be a scholar! Make a lot of dua in the sujood of your prayers for Allah to send you a righteous husband who would take care of you and cherish you.