Confused about guy and scared of commitment

Hi all, Ok, I'll try and make this quick. Met this guy a few weeks back, we'd known eachother for 5 years although never really been 'good' mates, just know eachother for a chat and bit of crack on. Anyways, since we saw eachother in Jan - random bumping into eachother while out on the town. We've been talking nearly daily about pretty much everything. He's been confiding in me and vice versa. Anyways, I used to think he was a bit of a d*** who just liked to drink and smoke but since we've been talking I've gotten to know a lot more about him. I wasn't wrong when he was younger but now he's different. He's asked me out 3 times since we saw eachother, and I've had to say no - I work 50-60 hours a week sometimes more due to my career. As much as I would like to go and see him, I'm completely terrified. He's a few years older than me (I'm 21, he's 27) and says he's looking to settle down. However, I'm completely and utterly terrified of commitment, this is (i think) due to seeing so many relationships end badly and people beating themselves up over it. As well as that, I've never had a BF, am still a virgin (he's not and has had several gfs) and don't really know how to be in a relationship. I've also been knocked back by guys I've really liked, at one point loved. None of this is helping. So as much as I would like to see him, i'm completely inexperienced at this (i have been on a few dates but never made it to the second due to fears) Plus everyone I've dated has been at least 4 years older than me. Another thing is He's constantly complimenting me, telling me how pretty I am, how lovely I am etc which always feels nice but sometimes makes me feel a little awkward. Secondly, I'm scared he'll hurt me. I know his friends and quite frankly I can't stand them, fairly sure they dislike me too. However, I know how important they are too him. Would this be a deal braker as I would never, EVER want to spend any time at all with them. I deliberately don't get attached to guys since I had my heart broken when i was 19. However, I can feel myself getting attached to him despite not having met up again yet. So I'm beginning to get scared all over again. Any advice is really appreciated, thank you :)

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