Just so you know, I have autism, a mental disability that keeps me from recognizing other people's social cues. As a result, when I played through Dragon Age: Origins, I was constantly dependent on approval meters to tell me how much my party-members liked me. I also gave them gifts to further increase their approval of me, especially Feast Day gifts to maximize their approval of me.
But then comes that new game I'm playing right now, Dragon Age: Inquisition. Unlike Origins and DAII, I now have to recognize how much specific party-members like me based on their social cues and dialogue. Unfortunately, I can't do something like that, because again, I have autism.
Of course, I have another way of gauging how much my party-members like me, and that's probably unlocking their side-quests and completing them. Technically, party-members of nearly any RPG tend to have character-arcs, whether within the main-quest itself or taking the form of side-quests. Once their character-arcs are fully resolved, they end up developing a better bond with the player. For example, Persona 4 had Social Links, whereby resolving the seven Investigation Team members' arcs and bonding with them, do they evolve their personas to reflect their fully-resolved character-arcs.
And that was what playing Dragon Age: Origins was like when I played it, as well. Party-members can bond with me better if I unlock and complete their side-quests, in other words, their character-arcs. Zevran was the only party-member without his own side-quest, and yet there was a random encounter where he ended up siding with either me or the Antivan Crows, depending on how much he liked me.
So surely, unlocking and completing side-quests in Inquisition will help me bond with my party-members just as much.