I'm too innocent?

I'm an 18 year old girl and I worry about how innocent I am. I feel like I stopped developing mentally at the age of 12 or something... I think this is the reason I struggle to make friends at college. For example, one day we were sat round the table and a girl goes "okay let's go round the table and say the funniest thing we've done while drunk". So I made an excuse to leave. Similarly, if we're ever playing truth or dare I have to leave because watching people get dared to kiss each other makes me feel so anxious. I'm really shy but I'm working on it and so I've never had a boyfriend or even been kissed. I've never been clubbing either. I spend most of my time at home in my room and when I do go out it's just shopping or to the cinema with my best friends. I went out for my 18th back in January just to the pub with 2 friends and had some shots and got a little tipsy but apart from that I've never had alcohol. It scares me seeing people my age because it's not like they're still at the "omg I lost my virginity hehe" they're so used to it that they're comfortable with it. At college they talk about it so freely that it just makes me feel so anxious because I'm so far behind them. Most girls I know text boys and stuff but I don't even have any close guy friends. A couple of years ago a guy liked me and gave me a bracelet and it made me so anxious I couldn't eat. I know it's because I'm not used to it but it's pretty worrying. I keep myself to myself quite a lot of the time and then when I speak to friends and they tell me all about what people we know have been up to I just can't believe it... Literally everyone has lost their virginity and I feel like even if I did get a boyfriend he'd be used to the casual approach to sex and wouldn't understand why I'm too nervous to even kiss him. It seems all conversations revolve around drinking and boys and it's awkward. Does anyone have any advice?

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