Here's a sermon on 1 Corinthians 7.
Basically I think the chapter's about contentment. Marriage and singleness etc are a presenting issue (v1). But really Paul's telling us to stay put in our circumstances.
And to do it we need to remember calling, timing and gifting.
God's call (v15, 17, 18, 20, 22) is His call to fellowship with Christ (1:7). And it can come to anyone in any circumstances. So the grass is not greener in another set of circumstances, you can fulfil this incredible calling wherever you are. So be content.
The time is short (v29). Marriage is not 'happily ever after', it's momentary. Even if your job is "for life" it's completely insecure. So plug into the roles where God has you but don't be "engrossed" (v32). Our home is the future, not present circumstances. So be content.
Our circumstances are a gift (v7). If you're single you have the gift of singleness, if you're married you have the gift of marriage. ie your circumstances have been given to you from the hand of Christ. Singleness/marriage, this job / that job / unemployment is His gift to you - a gift from the One who loves you more than you love yourself. Receive it as His gift and be content.
I ran out of time at the very end and left out a page of my notes. It was basically all about how you're supposed to ever get married, given that singleness is to be preferred, and we're not to look for a spouse.
In brief - we should learn contentment in all circumstances, understand the benefits of singleness and if there's someone on the scene who belongs to the Lord (v39) and wouldn't be a sinful choice in other respects, and if you actually want to marry given all this, then go ahead. Sexual attraction is a major sign that marriage should be on the cards, and if it is then for goodness sakes hurry up before it turns into sexual sin.
That kind of thing. I also drew people's attention to these resources.