Kallithea Halkidiki Greece

Looking for suggestions for a romantic 4-night trip in Halkidiki (Kalithea area
Post:
Hey everyone
I'm going with my girlfriend for 4 nights in Kalithea (Halkidiki, Greece) and I'm looking for recommendations .
We already have accommodation sorted, but I'd love to hear
• nice beaches nearby (less crowded if possible)
• romantic spots for sunsets or evening walks
• good places to eat (not too touristy if possible)
• anything special to do as a couple in the area
We want a mix of chill beach days and some nice romantic experiences.
Any personal experiences or hidden gems would be really appreciated