Formal:
* मला तुझी आठवण येते (mala tujhi athavan yete) - This is a direct translation of "I miss you" and is appropriate for someone you don't know well.
Informal:
* मी तुला खूप आठवते (mi tula khup athavte) - This translates to "I miss you a lot" and is more personal and intimate.
* तुझी आठवण येते (tujhi athavan yete) - This is a shorter and more casual version of the first option.
* तुला भेटायला मला खूप वाटते (tula bhetayla mala khup vaate) - This means "I really want to see you" and expresses a strong desire to be with the person.
Romantic:
* तुझ्याशिवाय जगणे कठीण आहे (tujhyashivaya jagne kathin ahe) - This translates to "It's hard to live without you" and is very romantic.
* मी तुझ्यासाठी वेडा झालो आहे (mi tujhyasathi veda zhalo ahe) - This means "I'm crazy for you" and is a very intense expression of love.
The best way to choose the right phrase is to consider your relationship with the girl and the tone you want to convey.