Have I correctly used 'since/for/because' and 'expressions of affection' in this statement?

There are risks in falling in love since/for/because expressions of affection such as saying "I love you," kissing, and the like may not be reciprocated
The whole sentence sounds unnatural to me.
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How can I make it sound natural? Would it be OK if I rewrote it as follows?

Expressions of affection...may not be reciprocated, and risks in falling in love should not be overlooked.
Falling in love involves risk because the feeling may not be mutual.