Girls, I'm 24 and have my first boyfriend. How much should I allow him to touch me?

I've been pursuing my master's and I work as a loan officer in a bank. My boyfriend is an office manager who is tall, strong, confident and also intelligent. We've been dating for three weeks now. Some friends and I were going to a cabin in the woods for a weekend and he came to visit. He chopped wood and made a fire to keep everyone warm. I kind of sensed he did it to impress me. Afterward we were hanging out a bit, and he came behind me and pushed my sleeves up so my arms were showing and rubbed my arms, then he uncovered my stomach and tickled it. Should I allow him to do things like that at this stage?
Girls, I'm 24 and have my first boyfriend. How much should I allow him to touch me?
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