You're taking these verses out of context, and that's not cool.
First of all, you say that Paul says that "marriage is honorable IN ALL..." But that's not how the entire passage reads. Hebrews 13:4 says, "Let marriage be honored by all AND THE MARRIAGE BED BE KEPT UNDEFILED, FOR GOD WILL JUDGE THE IMMORAL AND ADULTERERS." The passage doesn't mean that EVERYONE should be married. It's that a marriage should be respected by everyone. Those who are married, shouldn't commit adultery. Those who are not married, should respect the marriage of others...and not interfere. Even in-laws should "keep out!"
As for younger widows marrying, he didn't tell ALL of them to marry. In fact, in 1 Cor. 7:39-40, he says, " A wife is bound to her husband as long as he lives. But if her husband dies, she is free to be married to whomever she wishes, provided that it be in the Lord. She is more blessed though, in my opinion, that she remains as she is, and I think that I too have the Spirit of God." Notice that it doesn't mention whether the widow is older or younger.
And in 1 Timothy5:14, he says, "So, I would like younger widows to marry..." and he gives his reasons in 1 Timothy 5:11-13 (to paraphrase)so that their "sensuality doesn't estrange them from Christ" or they become idlers, busybodies, and gossips. Of course, not ALL younger widows do this.
Paul also says in 1 Cor. 7:27, "Are you bound to a wife? Then do not seek a separation. Are you free of a wife? Then do not look for a wife."
Doesn't sound like he believes that ALL men/women should be married.
Paul isn't "commanding" widows to marry, nor is he commanding ANYONE to marry.