My point is that it sounds like you give your husband more exclusivity than God. What's sacred to you is your marriage, perhaps even your MBTI score, or the rules of this forum, but God is relegated to an admixture of sacred and profane spaces depending on your mood (presumably), or what is convenient for you(?). I don't know.
Not at all. I have only one husband, and I have only one God. My husband doesn't stop being my husband just because we travel to Spain or go camping in the woods. God doesn't stop being God just because I approach him in a Hindu temple, or by myself in the forest.
And please do not trivialize my worship experiences by tying them to moods or convenience. Where and when I worship is driven primarily by what I find meaningful and effective. I also take advantage of opportunities that present themselves to experience worship in new and unfamiliar settings, as I find I learn a great deal from that.
If every space can be sacred, then what exactly does it mean to be sacred?
Every space can be sacred, because there is no space that is off-limits to God. We make it sacred by deliberately devoting that space and time to worship, especially the sort of communal worship you referenced earlier. Permanent structures dedicated to worship like churches and temples are readily recognized as sacred space, but it is not hard to create sacred space in, say, a home or an outdoor setting. Creating sacred space is a broad topic closely tied to ritual and symbolism - I have pastor friends who spent entire seminary courses on this. Every religious group will do this in their own way. Engaging the physical senses is a common method: surrounding the worshipper with sights, sounds, smells, etc. that are associated specifically with the worship experience. This helps break the connection with everyday cares and thoughts, allowing the person to focus more fully on God. Performing a repeated (i.e. ritualized) set of actions, prayers, or songs is often part of this . Of course these are all crutches, and someone well-practiced in their spirituality will be able to create sacred space quite readily with nothing but their own prayerful intentions.
How do you worship/commune with God?
This is a very personal question, and I'm not sure I will be able (or perhaps even willing) to answer it to your satisfaction. A key component of it on an individual level is for me to be able to focus single-mindedly on God, to the exclusion of all else, and simply open myself to hearing/feeling/experiencing God. It is very much a "listening" activity rather than a "speaking" one. It is also very much non-verbal. I appreciate the written word as much as the next person, but to me, communing with God transcends words - not that they are useless and have no place, but it goes far beyond that. (One thing I find about most Christian worship is that there is far too much talking, and by far too few people.)
Pagan worship always starts with a series of ritual steps that serve to create (or finish creating) that sacred space. As soon as that sequence starts, it works to disconnect us from that everyday reality, pointing our focus toward God. We invoke God using very vivid and poetic imagery, which has both the common element of what we hear, and the individual view in our own mind's eye. We reverse these steps at the end of worship, returning ourselves to "ordinary" space and time.