I am very afraid of love

We are loving each other for 4years. but his mother said NO for our marriage. also she said if you marry that girl means... i will commit suicide. because of cast problem. now he also said NO. he dont want to lose his mother. what should i want to do? all are trying to convince me only. but no one knowing that i gonna miss the 50yrs of life. am very wexed. am i am in a state to commit suicide. but i doesn't have guts too.