My fiance has been lying to me

@caroline4839 It's hard to say for sure what should be done (as to what I can give advice for) since I don't have the full story OR context, but let me make this clear: a partner SHOULD be fully honest with their loved one, especially in this case! I'm not on board with that kind of behavior either, quite frankly.

As I would say, I'd strive to ensure you two have better communication, preferable withholding judgement and at least trying to understand why this is happening, but I personally don't blame you for having your trust run out. I'm pretty sure it's well understood that vaping in general can be very harmful, especially depending on where it's sourced from (smoking in general if we're being real). It's tough to say, but sometimes, loving someone can also mean having to love them enough to get them to tell you the truth, and in that very same regard, the anger issues you also brought up has to be brought to light too, albeit even if it's a conversation that's hard to have. 

My motto with relationships is: "Remember, you're not fighting your partner (You V.S. Them), instead, it's You and your partner V.S. the problems" Keeping that in mind as you find ways to learn how to manage anger (which could make your fiance be more afraid (I could be wrong too, though.)

Again, these are some conversations you need to have with your fiance, even if it's uncomfortable. Couples can't grow without it, and if you can't bring these things up without feeling safe to someone who's supposed to keep you safe, would you still think loving someone is all you truly need? Safety, Trust, Understanding, Active Listening, and Communication! Much love and support, and I sincerely hope you're doing well! 🤗