Hello, I am pretty new to this...but I could really use some help here.
I dated this guy for 7 mths (6/06-1/07). we started out very slow since I am a divorced mother of three and my ex husband had an affair and left me for the Ow. About four months into the relationship I began to let my wall down and try. he was provin to be a sincere person who truly cared about me. We had a decent relationship, always had fun together and great intimacy/companionship. However, he was always jealous..doubting me with my where abouts, who I talked to, texted, etc....This caused many blow up arguments..especially when he would get drunk( did I mention he is a borderline alcoholic?). After the holidays and a weekend vacation to disney, I caught him in a lie about drinking one night. He had come over for dinner (with my daughters and I), arrived late( late meeting with the "boss" on a friday night...right!) and got drunk off two glasses of wine. I asked him if he had been drinking earlier and he said no. So when he fell asleep that night...I did a little snooping and caught him in a lie. A receipt for happy hour that night. This then made me drawn to check his text messages. Low and behold...he was talking to four different girls! Two were flirtations, one was an ex girlfriend( whom he was trying to initiate something) and the fourth was a co-worker, with a bf who he had obviously done something with...What, I did not want to know. from that I confronted him and he seemed remorseful..said it would never happen again..blah,blah, blah. For two days he seemed to be trying to work through it and let me vent/etc. Then, because I kept looking at his text messages and there were still responses coming from the girls ( I had made him send the girls "get lost" messages the night I confronted him) he said he had enough and left. We were through. We did not talk for a few days and then he said he needed "time apart". I told him if we did that it would be over forever.
Then I found this place and it helped. I started the NC rule and it worked. Two weeks later..I received a drunk call. I was curt and got off quick. I then received a few text messages that I ignored. Last week out of the blue he started text messaging me all of the time. The day before valentine's day. Tough time for all of us

I tried to ignore them but after awhile broke down and we talked (this was 4 wks since our break up)since then he has begged me to give him another chance, and tried to see me at my house...luckily I was away.
Last night I was not so lucky...he came over unexpectedly...and I let him in. He said all the things you want to hear, " i love you, i want to make this work, i want a future with you...." So we ended up being together. He now thinks we are trying for a second chance. I am sick with my actions now. since I am not sure what I feel. after 5 weeks apart I came to realize i do not think he could ever be faithful to one woman ever( he has done this his entire life)..why would I be the one to "change him"?
So here is my question: What do you all think. Should I give it a try? Give him the benefit of the doubt and believe him? Or do I look back at his track record and all of "the lines" he easily spews to all ex-girlfriends and just cut ties. And if I should end it what is the most tactful way? Remember he has lots of issues: alcoholism, victim of child abuse, repeat cheater etc...I really do not want a stalker. He does not take well to losing and always is up for a challenge.
Thanks for any and all advice!