No, you are absolutely not the only one. Loving grammar is a powerful and often underappreciated advantage in language learning. It gives you a systematic way to understand how a language works, which can accelerate your progress and make the process more satisfying.
Your approach of starting with grammar and vocabulary books, then moving to graded readers, is actually a very effective strategy. Grammar provides the framework, vocabulary fills in the content, and graded readers let you see both working together in real sentences. The feeling of recognizing a pattern you just studied in a text or conversation is one of the most rewarding moments in language learning. It confirms that your study time is paying off and builds confidence.
However, there is a tradeoff to watch out for. The danger of loving grammar is that you might spend too much time on analysis and not enough on actual communication. Grammar is a map, not the territory. You can know every rule perfectly but still struggle to speak fluently because your brain hasn't had enough practice retrieving words and structures in real time. To avoid this, balance your grammar study with active use. After you study a grammar point, immediately try to use it in a sentence you say out loud or write down. Use your graded readers to see the grammar in context, but also try to talk about what you read with a partner or language exchange app.
Concrete next steps: First, keep doing what works for you. Buy a good reference grammar book and a workbook with answer keys. Second, set a timer for your grammar study. Spend no more than 30-40% of your study time on grammar. The rest should be listening, speaking, and reading. Third, use spaced repetition software to review grammar rules and example sentences. This will help move the knowledge from your conscious mind into automatic use. Fourth, find a language partner or tutor who can give you feedback on your speaking and writing. You can tell them you want to focus on using the grammar you've studied. Finally, celebrate your love for grammar. It is a superpower. Most learners find grammar tedious; you find it fun. Use that enthusiasm to build a deep, accurate understanding of the language that will serve you well at every level.