Say “wǒ ài nǐ” in Mandarin is the most common, standard way of letting someone know “I love you”in Chinese. The symbol meaning for Chinese character “爱” or “愛” is to love people through your actions and with your heart.
Standard Chinese and Mandarin are, actually, one in the same. Mandarin has more native speakers than any other Chinese dialect,
In traditional Chinese the characters would be written as, 我愛你。
In simplified Chinese the characters would be written as, 我爱你。
Simplified characters are less in number and are made to be easier to learn because the characters have less strokes. At this time, simplified characters are widely-used officially in China and Singapore. The traditional characters are continue to use in Taiwan, Hong Kong, Japan (as kanji), Korea (as hanja), and most Chinese communities in North America.

Chinese Character: (ài) Love

含义 (hányì) meaning: love

部首(bùshǒuRadical:

笔画 (bĭhuà) number of strokes: 10 

 
爱的常用词语 (ài de chángyòng cíyŭ)
Useful Chinese words or phrases for love:
我爱你 wǒ ài nǐ  I love you
恋爱 liàn ài  fall in love
父爱 fù ài  paternal love
喜爱 xǐ ài  be fond of
关爱 guān ài  care

For example
Wǒ ài nǐ nǐ yuàn yì chéng wéi  wǒde  qīzǐ ma
我爱你,你  愿意    成为      我的  妻子 吗?
I love you! Will you be my wife?
wǒmen  liànài  le
我们    恋爱  了。
We’re falling in love.
Mǔài rú hǎi ,fùài  rú shān.
母爱 如 海,父爱 如 山。
Mother love is like the sea, father loves to be like hill.
Wǒ fēicháng  xǐài  xiǎo māo.
我  非常    喜爱  小猫。
I am very fond of kitty.
Nàgè hái zǐ xūyào gèngduō guānài.
那个  孩子  需要   更多   关爱。
The kid was starving for more caring.

生词 (shēnɡcí) vocabulary
妻子 (qīzǐ) n wife
母爱(Mǔài)n maternal love
海(hǎi)n sea
山 (shān)n hill
非常 (fēicháng)adv  very much
孩子 (hái zǐ)n kid