Is dating his friend is good idea?

I am with my bf for 4 years but lately he doesn t care about me like he used in the past
If I didn t call him he doesn t call
I feel lonely and need love
His friend saw me and gave me his number but I didn t call him yet
I want a new bf
I like his friend I wished if he could be mine one day
I will not hurry and take things slowly and there will be no sex before commitment and by this I will know if he is seriously want me or not

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