"Джеймс" if you want it in cyrilic or "Dzhejms" in romanized version.
In Russian, "Любимая" is how to say/spell sweetheart.
В is at in Russian.
да in the Russian language, or "da" is how you spell it in English
Jim is not a common name in Russia, so there is no official translation for it. However, it is possible to spell "Jim" phonetically. The closest Russian translation would be "Джим" (pronounced dzhim), since there is no equivalent for the letter "J" in the Russian alphabet.
'And' in Russian is spelled 'u'.
In Russian, "Caitlin" can be spelled as "Кейтлин."
"Как ты?" is how you spell "How are you?" in Russian.
Tranquility in Russian is "спокойствие."
Винтовка is rifle in Russian.
Папа is dad in Russian.
Кэти is Kathy in Russian.
That is the correct spelling (capitalized) of the word Russian (Русско in Russian).