I am reminded of Practical Magic, Sally is terrified of getting her heart broken so she refuses to fall in love. Her aunts want her to be happy and feel love, so they cast a spell to help her open up. As a result she does fall in love, but the man dies and she is left heartbroken as well as betrayed/resentful towards her aunts who only wanted to help.
Point is, no matter how good your intentions, it's best if the person decides. You could do a divination to see if they care for you or someone but it should be their choice. Same goes for healing spells, you think casting a healing spell to help someone is good, but if you don't ask, you're making the decision for them, thus taking away their right to choose. Mormons don't believe it's right to have blood transfusions, and many people sign papers saying if something happens do not resuscitate, or they don't want to be hooked up to machines to stay alive. While a doctor might disagree, they must adhere to the patients wishes. So too as a witch must you do what the person wants, not what you want. Sometimes you might throw your hands up and say 'who cares what karma throws at me, I need to do this' and that's fine provided you reflected and choose it based on your personal views.