I [26F] have always suffered from migraines, my boyfriend [28M] didn't believe me

My boyfriend, I'll call him Greg, and I have been together for about a year. I'll just cut to the case: I've suffered from migraines since I was a teenager. They're bad enough I've seen specialists about them and have prescription pain killers that I'm suppose to take when I feel one coming on. I know a lot of people say they get migraines that are really just bad headaches, but for me it's the real deal, vetted by a doctor and all.
Greg's feelings towards my condition are... Complicated. He believes I used to suffer migraines, but don't anymore. He believes the ones I had as a teenager were real, otherwise I couldn't have gotten the disagosis or prescription, but that I grew out of it and don't get them anymore. He cites the fact that he's never seen me suffer one as proof of his theory. He's never seen me suffer one because I take my meds when I feel one coming and nip it in the bud. When ever I said I feel a migraine coming and reach for my meds, Greg sometimes asks if I really feel it or if it's in my head. My response has always been the same, he's not my doctor and although I love him and value his opinion on many topics, this is one thing that I feel he is unequipped to make a judgement call on. He's always nodded and (I thought) understood, but I could always tell he wasn't happy with my answer.
A couple weeks ago things kinda, I dunno, escalated? I'm still angry about it so bear that in mind while you read this.
I'd been at Greg's place a few days, we both had the weekend off and we're spending it together. It started when I felt a migraine coming. Greg and I were cuddling at the time so I got up to take my meds. Greg tried to stop me, saying he didn't want to ruin the moment. I just said I'd be back and left. I went to my night bag where I kept my meds and they weren't there. I rummaged through it trying to find it but it just wasn't there. The pain in my head is getting worse, so I give up on trying to find the bottle and reach for my purse where I keep a smaller bottle for carrying around since I figured they would do for now.
That was gone too. By now I'm pretty distressed and the pain is getting worse so I'm emptying my bags on the floor. Greg comes in after a while and asks what's wrong. I tell him I can't find my meds and the need is getting worse and I know it showed in my face and voice. He sighed and said I look like a drug addict looking for a fix. He tries to take my hand but I don't let him and keep on looking.
After a while of looking and not finding my meds my head starts really pounding. I give up and resign myself to waiting out the migraine. I turned off the light and went to bed hoping to sleep it off. Greg checked up on me occasionally, asked if I needed anything, I just told him I needed to sleep it off and be left alone. I never did end up sleeping, the pain got worse and I was getting nauseous. It was overwhelming and I dashed into bathroom to dry heave. Greg came in to check on me again and held my hair while I vomited. He asked if there was anything he could do, I said that unless he could pull my meds out of his ass we'd just have to wait it out. After I'm done throwing up he helps me back to bed.
A little while later Greg comes back with a big glass of water and my meds at the time I didn't really think about it much, just assumed he found them somewhere. I was just so glad to see them that I took them and went to sleep. The next morning over breakfast Greg fessed up: he took my meds and hid them to "prove" I don't need them. It backfired and he apologized profusely for it. I didn't say anything at all, just I needed time to think. I asked for space and left his apartment.
It's been a while, I've been mulling over what happened, and I'm conflicted. On one hand I'm furious at him, he's known since day one that I was officially diagnosed with migraines. I've never lied to him, he never had a reason to doubt me. On the other hand, he seems genuinely remorseful. He told me the truth without me having to ask, he was very sorry, and he has this far honored my request for space. He's always been the type to admit when he wrong and never repeat mistakes, so I'm fairly confident that if I do forgive this it'll never happen again.
I'm second guessing myself though because when I talked about this to a girl friend of mine she said I was crazy for even considering taking Greg back. She says that messing with medication is something that should never be forgiven and I'd be condoning his behaviour by taking him back. I was definitely leaning towards forgive and move on before this conversation but now I'm not so sure.
TL;dr boyfriend hid my migraine medication from me until I got very ill then gave it back. I'm sure he regrets it and I want to forgive him, but my friend says I shouldn't.


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