Shoul I tell him???

I'm in a lovely relationship with my current boyfriend since 7 month. I really love him and I enjoy every minute we spend together but I already thought about breaking up with him because he takes drugs and this topic always makes us argue etc and I've already lost my best friend because of drugs but my boyfriend doesn't care about how sad I am about this topic. 
Today I met a good friend of mine (I really like him, I guess he would be a perfect boyfriend), he kissed me and he also wanted to have sex with me. But I stopped because I have a boyfriend and I love him but sometimes I feel really destroyed because he's taking drugs.
My question is: Should I tell him that my friend kissed me?

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