Hello, In the spoken language you will hear حبيبي "my boyfriend" and حبيبتي "my girlfriend". Both mean "my crush" as well. حبيبي and حبيبتي are also used between: parents and their kids, siblings, relatives.. kind of similar to how "sweetheart" and "darling" are used in English. *حبيبي is used a lot in songs. محبوب has a double meaning: 1) A person who is admired and loved by everyone around them. 2) Boyfriend/girlfriend/crush It is often used as *محبوبي (masculine possessive form) or محبوبتي (feminine possessive form) like the previous one. محبوبي is also used in songs but not as common. It is widely used in Syrian folk songs (https://www.youtube.com/watch?v=JFZmrO3nVMQ). *Although حبيبي and محبوبي are in the masculine form, they are used in songs as gender-neutral nouns: My love, the person I love....

حبيب is a name and comes from verb يحب ، but, محبوب is adjective from the same verb, this adjective you can use it to describe some things some facts and some verbs but حبيب you can describe persons using it mostly , Also you can use جداً which equals “ very “ or “ so” etc. in English, you can use جداً with محبوب for example: هذا اللون / الشخص محبوب جداً لدي الجميع But actually حبيب cannot use جداً with because it’s a name