Is he interested in me?

We are online friends, living in different countries, who met through a video game. We were really close before but after a rough patch in his romantic life, we seem to be closer than ever. He trusts me a lot. He seems very interested to know me deeper and asks me very intimate questions. We talk for nearly 3 hours whenever we have a phone call. He always tries to keep the conversation going. I like him but is unsure about his feelings. Can someone help me out? Do guys do this with all the girls they know?
Is he interested in me?
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