Should I trust him? Weird male friend

I've been friends with this guy for like 4 years and he's always been sort of desperate when it comes to girls and relationships. A few weeks ago he invited me to his house and bought me like a 12 pack of beer. I thought we were sharing but I think he only had like 3 bottles and I had the rest. He tried to convince me to let him drive me out onto the hills above our town in his dad's car but I said no because he has no liscence and we were intoxicated. He kept asking me to stay over and at one point I talked to him about my relationship problems and he told me i should just break up with my boyfriend.

I know it all sounds dodgy but at the time I didn't think much of it.

Like a week later he invited me on a night out and I decided to go and bring some other people incase he started acting weird again. I dont remember much of that night because I got spiked and ended up in A&E. But afterwards I spoke to this guys best mate about what happened and he thinks thay my friend spiked me or pressured me while drunk to take ketamine. Apparently the state I was in looked like I was in a K hole and black out drunk at the same time. This friend also said he thought he saw my friend trying to kiss me at one point. I can't get the thought out of my head that this friend I've known and trusted for so long has been trying to take advantage of me. Do you think its true?

I honestly don't know what to do. Like should I confront my friend? He's just left the country to go work in Cyprus for a few weeks but normally we live in the same village so I can't really avoid him. Any advice anyone has would be so useful! I know this is such a weird situation and also a lot to read so thank you for your time!