I understand your worries, young brother.
I am also someone who rarely engages in socializations due to the issues of establishing true connections and sharing similar interests. For a while I followed your way by trying to "fit" in with the group of people that were my acquaintances, which consisted mostly of Christians (Evangelicals and few Catholics) and about two to five Muslims. However, most of the time these people would be parroting things related to the Bible and Quran about how their god is good and just while Satan is evil (you might have heard about theological differences between Christianity and Islam, but these people both agree on Satan being the evil and someone who is behind for their lives being shit and their prayers remaining unanswered). The rest of time they would play some stupid games and conversate about meaningless things like celebrities and other stuff that offers nothing of use to the developing mind. This teams of people are led by some Evangelical Christians and their pastors, who come to my city in Bosnia to spread their pollution and gather new potential converts, while forming friendships and bridges with people from other Christian denominations and Muslims. I had the unfortunate role of a translator for them for a couple of months, and every week they would gather at the church where their pastors would preach. I was visually disgusted when one pastor was speaking about the destruction of people of Jericho and the murders of kids (all ordered by the Abrahamic God of course), and while translating, I noticed that these people failed to see the problems in these passages (almost as if they are deaf or they simply cannot think for themselves and see that the Biblical/Quranic god is the evil one). They would also make gatherings for young people where the local Christians and Muslims in my city would meet with them for games and "important topics", which always included some crappy Biblical themes. I've also noticed that they never truly appreciated my role as a translator, besides few people maybe, so I decided to break my ties with them and never attend a single meeting ever again. I even blocked them on my social networks, deleting them as contacts and completely disappearing from the amalgamation of Andrapods (NPCs). Ironically, the last time I was there, the leader of this Evangelical team was a racial Jew with Christian beliefs, who kept reminding people about the holocaust and antisemitism being wrong.
I was even looked down by them because I showed no interest in their stupidity, and when I was still unaware, I foolishly tried to get friendly with some of them only to be met with unkindness and passive rejection (meaning someone would just pretend they are showing interest in what you have to say while undermining your value, but thank Satan - I am blessed with great perception, which enabled me to read such types of people easily). Since departing from them, my life has been much better, and I am able to focus on myself and duties I have as a fellow Zevist. I am still a translator, but this time I am only helping translate the stuff from Joy of Zeus into my native language, and it has been a splendiferous experience.
I'd highly recommend NOT being friends with Christians as they will invite negativity into your life. And above all do not reveal your beliefs to others it will only invite problems.
Oh, yes. I absolutely agree with you. The more I listened to their stupidity, the more time I lost that could have been fueled for success. Luckily, I managed to meet one local young man of my nationality during these meetings who did not show much interest to their stupidity while attending these social gatherings for local students and these American Evangelicals. For the entirety of the last meeting I attended, I spent time with him in the corner of the room discussing philosophy and asking, as well as answering questions related to critical thinking, common sense, knowledge and true spirituality. He is the only one with whom I still keep contact, and I have had some coffee meetings with him where we continue our discussion related around the same matter. He knows that I am not a Christian, and I presented myself as a "Deist" because carefulness is still wanted when it comes to our Zevist belief. But, the stuff I spoke with him made him question the Bible, and it was nice seeing that he was using his reasoning to come to the conclusion how many things there make no sense (like a person going to hell simply because they are not Christian or Muslim in the case of the Quran, despite the same person being a much better human being and more morally just than most of these believers).