I've never packed, as I feel not only the act of putting it on/taking it off would make me feel more dysphoric, but I also feel like the discomfort of having to wear something like that all day when it's really just for show would bother me. I can definitely see how it helps a lot of people, but it's definitely not for me (I've finally made it out of the confines of women's underwear, I certainly don't want to have to struggle with anything else down there; I feel so free without things pressing against my unfortunate genitals). So I can't really advise you on that aspect.
Unfortunately, as has been said, gender and the brain isn't always cookie cutter. There aren't two forks in the road, and you get to pick one. Each person is incredibly individual, and sometimes, when you don't fall directly inside the perceived "norm", it's harder to figure out what you want for yourself. Sometimes, we think we know what we want, and simply haven't taken the time yet to figure out if that's our long-term goal, or a passing desire. So it's always important to take things slow, and fool around with your options, before taking steps that can't be reversed. Getting a packer and seeing how you feel about it is a great first step, and coming on here to research and talk to people will help a lot, too.
I've always felt completely male on the inside, ever since I was a child. I've already had top surgery and don't ever miss my chest; rather, I feel more freed from the female body I've been stuck with. I feel much more myself, and can't wait to see more results from T and future surgeries. I wish my body could be 100% male. HOWEVER, that doesn't mean I don't wish to enjoy female stuff as well. I see beautiful women with great hair and clothes, looking stunning, and I'm somehow jealous that I can't ever look like that. Maybe it's because I'm still so early in the transition process and still get deemed as female most of the time, but I do feel the urge to cross-dress. Maybe the more male I feel, the less I'll have these urges, but only time will tell. (I don't cross dress due to my discomfort about this whole transition process, but I'm hoping once I feel better about my male appearance, I'll be more confident stepping outside of gender norms.) I do, however, plan on doing many female cosplays in the future, along with my male cosplays. For me, I've come to accept that I want a 100% male body, but I don't mind the idea of occassional cross-dressing. I wasn't always sure that's what I've wanted, and it's taken some time to figure that out about myself (who knows, maybe I'll try it eventually and realize I don't actually like it for myself--we'll see). I've always just wanted to be a normal guy, but if it turns out I'm not, so be it. I've spent too many years denying who I am to not be willing to accept being in-between things, if that's who I turn out to be.
And I can fully understand how someone could wish to have both male and female parts. I used to be a member of a female boob-growth board (back when I tried to fight my trans issues by becoming more female), and there are a good number of guys on there who desire breasts, but don't wish to become females, and thoroughly enjoy their male parts. Just the same, there are also lots of people on here who consider themselves trans, and may take a few steps to transition, but at the end of the day, they like having a little bit of both. Some people wake up feeling male some days, and female others, and decide to dress/name themselves accordingly. There are so many things in between being male and being female, and accepting that may help you figure out just how much you might want for yourself.

Honestly, as much as I just wish I was born with the right parts, I don't ever want to get "full" bottom surgery. Very few surgeons offer this option, but you can get a partial meta (after your clit enlarges with T, they pretty much clean it up down there and make it like a micro penis). Personally, I want to keep my "extra hole" and get my urethra rerouted through my "penis" so I can use it like a bio male. Unfortunately, if you decide to keep the V open and also want the urethra moved, there is a 25% chance of failure. For me, I'd take that risk and hope for the best. Despite the fact that I feel like a man, and don't wish to have any part of a female body, it is an amazing sex organ, and without it, I worry that I will lose my sex life. Even if I were to hook up with a man who could penetrate me (meta results aren't usually big enough to penetrate by itself), I have a lot of digestive issues, and am not always eligible for *ahem* gay sex. I'm not sure if I would ever get testicular implants, as they could get in the way of accessing that hole (although I would absolutely love having them).
Keep doing your research and talking to people. Try things you've never done before. It's so great that your boyfriend is so open and honest with you. I loved that post he made, you can tell he really loves you and wants you to be the best version of yourself, for yourself. You're so lucky to have such a great, understanding boyfriend, and I really think having him to discuss these things with will help you along this journey. Good luck to you both, and take your time reading through all the wonderful threads in these forums. They'll really help open your eyes and give you a great perspective on what options are out there for you.