passion has an expiration date

ive bn married 7 years.  i love and desire my husband.  his desire 4 sex has lessoned since our first few yrs of marriage.  i had accepted this.  i did not like it but accepted it.  then found out he was having an affair and he was having sex with her.  but with me now that the affair is over.  the sexual desire seems one sided.  he just doesnt think of sex he says.  i know i am desireable so this is very frustrating.  how can he desire this other chick b/c its new he says but no passion 4 me.   im trying 2 b patient but this was never a prob i expected 2have in my marriage and i dont know what 2 do about it.  i pray.  and im hurting.  and tempted.  and quiet.  i dont really want anyone else so i just feel screwed and disappointed.