This pairing is based on the attraction of opposites. In a nutshell, the Libran does everything you do or feel in the opposite way. That doesn't mean in terms of literally doing the opposite things, of course; but think of why you do something, the motivation behind it, and you will be able to observe the Libran doing things for the opposite reasons.

Librans are far less active and decisive than you are. Where you want to do things for yourself, and rearely consider what anybody else might want to do, the Libran is always ready to listen to alternative points of view, and is quite likely to be swayed by any of them. He would much rather do something in company than on his own, which means that he is likely to find imself doing what his friends suggest, rather than being left out.

Your decisiveness will guide him easily. When you decide what you want to do the Libran will agree. The benefit for you is that you have a companion, and the benefit to him is that someone is making the decisions for him so he doesn't have to think so hard. Librans can ge t very inactive because they have an infinite capacity for putting things off until another time. You may have to be prepared to push them into action sometimes, and if you aren't up for that then maybe this relationship isn't for you.

The problem in this particular coupling of zodiacal types is that you are both concerned with personal issues. The Arian is concerned with being an individual and the Libran is concerned with being a partner to someone. Therefore the relationship between you has to be built on you personal relationship, and can't rely upon common interests like career or family to succeed. You have to actually like each other. If the Libran feels that he isn't close enough to you, then he grows remote and dejected. If you feel that he is a weight around your neck, then you may get angry and feel that you can't be yourself. Opposite sign relationships like this one have a tightrope type existence, and you both have to be very careful.

A long term relationship between you like marriage, is bound to be a see-saw type arrangement, alternating between furious activity and times of quiet. More than anything the success rate in these long-term undertakings depends on you actually liking each other a lot.