Can I protect someone I love and get what I want without harming anyone or doing anything considered “evil”?

Yes, but you can only protect someone with their permission. A misconception about magick is that we can just go around casting spells on people for love, security, and health–we can’t. the wiccan rede states “first, do no harm” and we sometimes don’t know how a spell will help or hurt, because while we can cast spells, we might not be able to cast the outcome, and typically the result is not what we expected. You have excellent intentions by not wanting to hurt anyone. That’s a good start.