Wa `alaykum as-salamu wa rahmatullahi wa barakatuh. 
Intimacy is a major part in marriage that causes both spouses to stay away from Haram and get a chance to have children. If your case is confirmed that you cannot have intercourse, then you must treat yourself before you seek marriage.

 

If your case in not treatable, I suggest to seek marriage from a lady who is OK with such condition of yours like widowed or divorced with kids.

 

In this way, you get to be having a partner in life that covers other needs like companionship etc.

 

Allah Almighty knows best.