Happiness in your "human form" is 100% conditional. To understand this, it’s best to observe yourself as an organism. An organism cannot grow, live, or sustain itself without the right conditions. Some animals need cold winters, others are more social and depend on having a group or tribe, and some require very specific reproductive strategies, etc. We are the same. And because we are one of the more complex organisms, our needs are far more niche, precise, and heavily conditional. Just turn off your heating or electricity for a day, and you’ll quickly see how conditional your happiness and well-being truly are.
The more "meditative" or "enlightened" type of happiness is often described as unconditional. In this state, you’re in such a high state of awareness that whatever conditions you’re in, you recontextualize them as part of understanding yourself as an observer of reality, or as one with oneness, God, or existence itself. You’re so completely detached from your human self that it wouldn’t matter if you cut off your arm right then and there. You’d just perceive it as part of "exploration, understanding, and Love." That’s often what drug addicts, especially heroin users, experience. If you ask them why they keep running their lives the way they do and continue taking heroin, they’ll often say, "Well, it’s because heroin takes it all away and makes it feel good." These states are beautiful but highly dysfunctional and dangerous to your human self.
However, this state is incredibly difficult to maintain, especially if you still want your human self to function and participate in "human society." It’s so impractical that it’s almost useless to think about unless you’re planning to fully commit to the path of a monk or yogi who meditates 24/7 and is supported by others in a monastery.
If you don’t plan to go down that path, then yes: happiness is 100% conditional. You need to accept that and carefully define the conditions, preferences, and actions you want to build your life around in order to feel good.