If you are learning this now, i think you will make better choices in future relationships. You will be able to spot the phony self-centered men and recognize true friendship, connections, love.
We all like the *spark* and excitement of connecting with someone physically and emotionally, but some people are not honest as your xbf..he hid his drug addictions from you and never once considered how this was harmful for you and the consequences of his actions.
...6 months from now you will Be so far ahead of him and shake your head at his stagnant garbage...and if he keeps relapsing on whatever or new drugs...he will still be sitting in his bedroom with mommy and daddy until they get sick of his lies too.