It is so easy to get drawn to someone else who is sympathetic and who values us when we are feeling disappointed, let down or hurt by our husband. But marriage is about making a commitment to work through the difficult times and there must be hope since you've noticed some improvement in your husband's attitude. It's wonderful that your friend is praying for you.
I tend to agree with the other posting that you would do best to keep away from your "lover" and certainly not see him alone or try to contact him in any way that's not out in the open. If he really loves you and wants what's best for you then he'll want to see your marriage repaired however painful for him.
Love is not just about having loving feelings. You might like to look at some of the articles on this topic. All you need is love
are about how we see love and respond to our feelings. Marriage is about commitment through the tough times as well as the good times.
Have you taken any steps to talk to your husband (not about your colleague, but about your marriage) or seek help for your relationship as a couple? There is counselling
, or it may simply be a matter of trying an enrichment course
, your husband may not be aware of your needs or even that he is hurting you.God's grace is available for you to repair and heal your marriage, if you can trust him for that.