<human>: Can you condense the text into three sentences or less?

My bf and I just recently passed our 2 year anniversary. Recently, his mom invited him on a trip abroad for a week, him, his brother and her brother. He was very excited and left yesterday. I was excited for him but felt a little left out. After two years, I'm worried our relationship hasn't grown with any amount of seriousness. I've met his entire family (except his father who lives 4 miles away). We don't live together or share keys for either of our apartments. We haven't taken an extended vacation together nor talked about any plans to move in. He has only met one of my brothers but that is because my family lives far.

I am just wondering if this relationship is developing slower than it should be. I met him when I was 22 and didn't care about seriousness in a relationship. Now that I'm older I love him but feel almost stagnant or that the relationship development is stunted. After 2 years should we be farther along than this? I know this may seem irrational but when I see my friends and acquaintances going on trips with their SOs it makes me feel like our relationship just isn't serious. I'm worried we are just placeholders.
<bot>: how far along should a serious relationship be after 2 years? BF and I don't live together, haven't met the others full family, never taken a vacation together.