Am i normal

I'm 19 and I want sex so bad I think about it all the time I'm a virgin and I have never even been kissed and feel like I'm never going to get a boyfriend or have sex and no one will like me because I'm fat and have stretch marks how will I ever have sex i even have stretch marks on my arms and shoulders so I can't wear sleeveless or of the shoulder tops all my friends have boyfriends and I just feel so left out and whenever I see a couple on Facebook or Instagram or even in public I get depressed