How can I not be boring?

I (m20) was facetiming a friend of mine and her roommate (f19) and within 10 minutes of talking to me her roommate goes "you're kind of boring." That was unexpected because my friend and I seemed to be having fun talking while she was more disengaged. She also had a couple of other of comments that didn't make me feel great about myself. We ended up only talking for about another 5 minutes when due to connection problems (like actual ones but I know it was an excuse) she hung up. I asked her if she would call me back when she fixed them and she just said she would later. I know that they were facetiming another person.

I don't like that I'm not interesting. I thought we were having fun but I guess I was boring them. I know I'm not the most out-there guy. I'm a safe option with little past the surface. I've only had two girlfriends and haven't had sex yet. I feel like a loser and it comes from being boring. How can I be more interesting and more engaging?

How can I not be boring?
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