Simply simple. Tia mo = 我爱你 Ti voglio bene = 我喜欢你

Culturally, there is no equivalent. Confucianism discourages such explicit show of affection. To "love" one's parents or your superiors, we use 孝敬 filial piety & respect. To your younger siblings, 憐惜/愛. You don't "love" your friends. 敬 would be the most appropriate. Of course in modern times, you can say whatever you want. And if being a non-Chinese, eyebrows will not be raised too high since it is understood that you are not culturally inclined. 喜欢 = like can also mean romantic interest if spoken in an intimate manner. Different cultures dictate different forms in society. So one works in one setting is seen as an affront in another. If you want to learn a language well. Know its culture first.

If you want to reveal your romatic feeling someone, you can say 我喜欢你.( This is the simplest and clearest one.) 我对你有些好感 or 我对你有一点儿动心 means I have special feelings for you but these two can be easily misunderstood. I have never said 我爱你 to anyone, including my parents, neither have them, but it can be various in some family, saying 我爱你 is very common. 有你做朋友真好 is enough between friends. 我爱你 can be a stronger feeling than 我喜欢你. You hear it between the husband and the wifes

To translate "I love you" directly, the answer will be "我爱你". And it can be used with friends, family members and lovers. But I think if you want to show affection, it's more common to use "我喜欢你". We do not say "我喜欢你" to our family members or friends.

Chinese looks hard. Give a hug rather!