What are some signs that a guy is becoming seriously interested in you?

GA701
If a guy buys you a gift, starts calling you more often (calling when he is in Europe on business to say hello), starts asking for your advice and travels an hour to see you and drops $250 on a hotel room and dinner (I live with my Mom so I don't have my own place), would you say he is starting to head in a more "serious" direction? What are some other definitive signs?
What are some signs that a guy is becoming seriously interested in you?
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