Ill tell you the story briefly and then I would like to hear anyone's opinions please!

I'm 18 and I work part time in a shop. I have been very close to a lad in there for well over a year and he is 21. We texted for months and very nearly got together but something inside kept telling me it wasn't right, although I'm absolutely obbsessed with him and I am madly in love with him, I know it would be wrong as he is the complete opposite and smokes and is on weed, which I don't like. Despite the fact he knows this he still wouldn't leave me alone, but as I enjoy the attention I let it continue, we text all the time and I'm work we are always hugging (but nothing ever more than a hug!)

A few months ago he started seeing another girl in the shop, it didn't go down to well at first as I was devastated, and he started ignorin me. I actually after around 4 months of them being together tried to move on and I sort of did, I didn't constantly look at my phone waiting for texts that never came etc etc. towards the end of their break up me and this lad started talking again and the texts begin and he ended up dumping her as apparently he couldn't bare to be with her for her sake knowing that he always thought about me and wanted to be with me.

Although I had promised myself not to get involved its somehow happened again and here I am in the same situation before, I've put him in his place and told him nothing can happen but he's adament that if we keep at it it will work and so we are always texting again and hugging in work.

Recently another guys started working in the shop and I took an instant like to him, he asked for my number and he has started texting me, I could see myself with him, but I'm petrified of it all because of the other lad, as I still have feelings for him even though we can't be together and I know if I start seeing this other guy that it will cause major problems and ill end up in trouble.

I'm sorry this is long, but you can clearly see the mess I'm in please please help me out I'm getting really down and desperate for help!

The one smokes weed and drinks is not the one you want to date, at least.
I am serious, you weigh it yourself now.
Be rational!
You don't have to meet boys only at work, actually that is not recommended in real world.
And you don't have to date someone, many people survived being single.
You are a lot of options, and it's totally up to you if you want your life to be a mess.
It's a learning process after all, anything that didn't happen the way you want to, you will learn from it.
Always be rational and be cautious on what you decide.