First of all, thank you to everyone who wrote nice, encouraging things and advice in my last post. I really appreciate it. I kind of got rid of this account after the post got too many views, but then randomly opened it yesterday to several messages about it being covered by SMOSH. I'm a huge fan of them btw, so this was very surprising.
Anyway, I'll cut to the chase. After writing that post, I did a lot of introspection and self-reflection. I think a lot of people caught this, but I do indeed suffer from low self-esteem and struggle with low confidence. I didn't want to acknowledge it, but it did get in the way of my relationships often.
I'm a brutally honest man, and that is exactly what I did. I was very honest about all of this to my girlfriend. I didn't tell her that I thought my brother and her were soulmates, but I told her that sometimes I feel like I can't directly connect with her because we're so different. And what she said really changed my perspective on our relationship. She said that she loves that I'm different and compliment her in a way that completes her. She also expressed that she would want to get more involved in my hobbies. So the past few months, we've spent time doing random things together that we individually enjoy and it's turned out great for us. She makes me really happy and I try my best to make her life better too. I've also met her family now, and they're all lovely people as well.
We still do things together with my brother, and it's also a good time. I think at the end of the day, the root of all of this was indeed my insecurity. It really wasn't about my brother, because I think I would've been insecure if it was a friend or really anyone else. Besides, it is true that I enjoy my brother's company because of the kind of person he is, so it has made sense for me to be with someone who is similar. It attributes more to the fact that she fits really well in my life. I've also come to realise that I was looking at this from a very trivial perspective. My girlfriend is so much more than her hobbies and interests, and there's so many other things about her that actually set her apart from other people in my life.
Thanks again everyone for your advice. Apparently I need to end this post with a question?