Any Advice? I really need help?

I'm 16 almost 17 and I've only ever really been in love with one guy. I fell for my guy best friend and he didn't like me back because he said he gave up on relationships after his ex.

I feel like I can't like anyone ever again. A lot of nice guys have liked me but none of them were my type. Some of them were just looking for the idea of having a girlfriend. and the problem with some of them is that they're younger than me, I just am not really comfortable with idea of being with someone younger no offense to anyone.

I don't fall for the jerks or anything like that I actually do end up liking the sweet silly type, but somehow after this guy no one seems to compare. I'm really worried I'll never find anyone.

This isn't me complaining, I'm worried, because I don't fall for people easily and this guy really broke me because I loved him for almost 2 years. Why is it that with a lot of other nice guys liking me I still can't fall for anyone else? Is this normal? I genuinely don't feel anything anymore except for him but I try and suppress it because I know he'll never feel the same.

Just please help me. There's another guy that likes me and I'm really tired of hurting people unintentionally. I just can't be with someone or date someone I'm not attracted or have feelings for. My standards aren't incredibly high. I just don't know what's wrong with me.

Please help.

Thank you everyone in advance.