Syntax: The segment uses the prepositional phrase 'From this moment' as an adverbial of time to mark a definitive starting point. The simple present perfect 'has begun' indicates an action started in the past that has present relevance. 'You are the one' is a defining relative clause structure (where 'that is' is omitted). 'Right beside you' is an adverbial phrase of place modifying 'where I belong'.
Morphology: 'Begun' is the past participle of the irregular verb 'begin'. 'Belong' is a stative verb in its base form, describing a state of being rather than an action. The preposition 'beside' indicates location.

Syntax: 'I have been blessed' uses the present perfect passive voice, indicating a past action (being blessed) with a present result (feeling blessed). 'I live only for your happiness' uses 'for' as a preposition indicating purpose. 'I'd give' is the contracted form of 'I would give', introducing a conditional clause (though the 'if' condition is implied: 'if necessary').
Morphology: 'Blessed' can be pronounced as one syllable (/blest/) in this context. 'Happiness' is a noun formed from the adjective 'happy' with the suffix '-ness'. 'Breath' is a singular noun; 'last breath' is a noun phrase.

Syntax: 'I give my hand to you' is in the simple present, used for a declarative, performative act (like a vow). 'I can't wait to...' is a common structure expressing strong desire and anticipation, followed by the infinitive ('to live', 'to start'). 'You and I will never be apart' uses the future simple 'will' for a promise and the adverb 'never' for emphasis.
Morphology: 'Can't' is a contraction of 'cannot'. 'Wait' is a regular verb. 'Apart' is an adverb, not an adjective, describing the state of separation.

Syntax: 'As long as I live' is a subordinate adverbial clause of time, meaning 'for the entire duration of my life'. 'I will love you' uses the future simple for a promise. 'There is nothing I wouldn't give' is a double negative for strong emphasis, equivalent to 'I would give anything'. It contains a reduced relative clause: 'that I wouldn't give'.
Morphology: 'As long as' is a compound conjunction. 'Wouldn't' is the contraction of 'would not', the conditional form. 'Nothing' is an indefinite pronoun.

Syntax: 'You're the reason I believe in love' uses 'the reason' followed by a defining relative clause (where 'why' or 'that' is omitted). 'You're the answer to my prayers from up above' is a metaphor with 'answer' as the complement and 'from up above' as a prepositional phrase modifying 'prayers'. 'All we need is just the two of us' uses 'all' as a pronoun, followed by a subject-verb inversion in the relative clause ('we need').
Morphology: 'Believe' is a stative verb. 'Prayers' is the plural form of the noun 'prayer'. 'Us' is the objective case pronoun, used after the preposition 'of'.