My girlfriend's son is ruining our relationship. Should I make a decision on our relationship or do you believe we can handle this all together?

We've been together for a month but I've just learned that she has a 10 year-old son. He is a child I know it but I feel that he doesn't want his mom to be with someone instead of his father. Do you believe we can handle this? I mean if we decide to get married, she told me that she wants to live with her son, so we all will live together. Do you think this is a big problem in a marriage?

My girlfriend's son is ruining our relationship. Should I make a decision on our relationship or do you believe we can handle this all together?
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