She stated : I wanted to confess to my boyfriend but was scared because he is a very hard person to talk to.

This does not imply an upright confession would necessarily have a different result....imo more of a damned if she did & damned if she did not.
I did think being upfront is always the best course, of action but to suggest that she wanted to sabotage herself, I think, is really stretching it.
And to suggest that he may be of the unforgiving sort is not to put any blame for her drug use on the loved one......some people are just like that.