<human>: Can you succinctly summarize the text in 1-3 sentences?

So I've suspected for a while now that my girl has been abusing some kind of drug. She's on anti-depressants and sleep meds. But, recently she dropped all of her college classes and didn't even tell me. She has no job, and anytime the prospect comes up, an excuse pops up why she can't go to an interview. We've been together for over a year now and more and more I can't shake the thoughts of her lying to me about this. We don't live together.

So, I got suspicious and maybe over stepped my boundaries and searched her car. I found two needles (not used, caps on). Now, as you might expect, I was hurt by finding these. But, she has a friend (that I do not like at all) that has a drug problem and they are always together. There is a chance they aren't hers. However, she has random bruises on her legs, she sleeps all day and stays up all not. She seems spacey and out of it sometimes and her pupils are the size of needle points when she seems like she's on something. She smokes weed all the time as well. 

I haven't found any track marks on her, but I just don't know. There are a ton of signs here that I can't and won't ignore, cause if it's true I want to help her. I just don't know how to confront her with this. I know it's going to blow up on me. Any advice would be appreciated.
<bot>: Suspect my girl is using drugs and I'm being lied to. Found needles and now I don't know how to confront her with this.